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Reference Specimens
The Folch Collection

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Photos by Fabre Minerals

On this page we have shown the specimens that were in the Folch Collection. We didn't want to delete them from our website given their enormous historical value, as well as their quality, so we decided to save them and publish all of them on this special page, which will act as a kind of representative overview of this great collection.
We hope that you enjoy your visit, even if it is just to see this page!

Text: Carles Curto (curator of the Geology Museum, Barcelona ) & Jordi Fabre
Assistance from John S. White (former Smithsonian curator)

The Folch Collection

The Folch Collection was known during the period 1960-1980 as one of the best private collections in the world. It was famous worldwide for its size (more than 15,000 specimens), the quality of the pieces, the large number of classic specimens, which are now almost impossible to obtain, and the style of the collection, which is surprisingly 'modern'. Sr. Folch (Joaquín Folch i Girona) collected during a period when the style of most collectors in Europe consisted of gathering large specimens of rare minerals, and in which esthetics and perfection were not that important. That said he actually tended to collect smaller specimens that were esthetic, and, where possible, damage free. On the death of Sr. Folch, in 1984, the collection passed to his son Alberto, and when he in turn died to his grandson Joaquín Folch who wisely decided to keep the collection exactly as his grandfather had it (including the display cases). So the collection was kept together and its enormous historical value has not been lost.

While I was a teenager, and still rather young, I had the luck to have been warmly invited by Sr. Folch to visit the collection. I made numerous visits, and with him beside me I obtained an enormous amount of mineralogical information, which went far beyond what I would have learned anywhere else. Given this experience I have always had a strong connection with the collection.

During my ongoing contacts with the Folch family a moment arrived when they suggested the idea of updating the collection so as to make it more up to date - since 1984 nothing new has been added and a significant gap in the minerals found since then has developed. After lots of friendly, unhurried discussions the Folch family asked me to help them with this updating process. To do this we have the luck that the collection includes many attractive duplicates. These duplicates do not add much to the Folch collection, as there are other examples of all of them, but given their unusual localities or simple high quality they are still good commercial specimens.

So, for the first time, the duplicate specimens from the Folch Collection will emerge into the sunlight. Each one of them has hand written notes made by Sr. Folch himself as well as, in many cases, his official label and number (in the case that they were part of the official collection). The duplicates will be sold during the shows that we normally attend, and also through our web site and store in Barcelona (you need to arrange a visit beforehand, which we will try to find a way of accommodating).

This project will take us a long time, as the pieces available are numerous and neither the family nor I wish to make the choices too quickly. The idea is to work slowly and select the pieces in a very systematic and careful manner. We think that given the special characteristics of the specimens that will be available and their historical value this will be a great chance for many collectors to obtain pieces that would otherwise have remained pure dreams.

We hope that little by little we can satisfy all those that wish to acquire a duplicate from the Folch collection and we can assure them that this task will give us far more pleasure than simple economic benefits. Sr. Folch was my spiritual father in mineralogical terms so handling his minerals and helping to improve his collection with new purchases is a fantastic sensation for me.

I cannot thank the Folch family enough for their good faith and for their wish to improve the collection. They are helped by the undeniable support and enthusiasm of Francisco Riquelme, the current conservator of the collection, and between them they have taken a step that many people have wished them to take and that will give collectors worldwide great joy, as well as increasing interest in and knowledge of the Folch collection within Spain and the rest of the world.

1926: Mineralogical Society, Jubilee Celebration.
Sr. Folch is the third from the right in the first row on foot

Sr. Folch holding an Apatite from Panasqueira

Typical handwritten labels from the Folch Collection

Typical record from the Folch Collection

Link to sold specimens from the Folch Collection

Arizona

Ajoite with Shattuckite

RX61M3: Well defined radially fibrous Shattuckite crystals accompanied by light blue Ajoite crystals in the small vugs of the sample (Ajoite specimens are usually massive)
One can read on the card that the specimen was purchased in 1959 from Scott J. Williams (Southwest Co.) of Scottsdale, Arizona. The piece is accompanied by a handwritten label and a card (Nr. 4988) from the Folch collection that we will send to the buyer.
New Cornelia Mine, Ajo, Little Ajo Mountains, Pima County, Arizona  USA (±1959)

Specimen size: 5.5 × 4.7 × 3.2 cm = 2.2” × 1.9” × 1.3”

With handwritten note & record from the Folch Collection

Copper

RV59H7: Extraordinary miniature. Faces and edges of the crystals have a very uncommon definition and the crystals forms are complex. Furthermore they are practically unaltered so they have an intense color and luster.
Ajo, Pima County, Arizona  USA

Specimen size: 3.4 × 2.3 × 1.7 cm = 1.3” × 0.9” × 0.7”

Main crystal size: 0.6 × 0.5 cm = 0.2” × 0.2”

With record from the Folch Collection

Probably Opal intense fluorescence short UV

Cuprite with Copper

RF13S7: Small crystals of Cuprite on an arborescent growth of native Copper. They are very sharp, with a dominant octahedron modified by smaller cube faces and are intensely sherry red and very bright.
Ray Mine, Ray district, Pinal County, Arizona  USA (±1964)

Specimen size: 1.7 × 1.3 × 0.8 cm = 0.7” × 0.5” × 0.3”

With handwritten note from the Folch Collection

Cuprite (Chalcotrichite) with Copper

RD47R6: Coatings of feltlike crystals of Chalcotrichite, with very intense luster and red color, on a dendritic growth of flattened crystals of native Copper on matrix. An U.S. classic that Folch acquired in 1971 from the well known Swiss dealers Siber + Siber.
Ray Mine, Ray district, Pinal County, Arizona  USA (±1971)

Specimen size: 10.6 × 8 × 4.1 cm = 4.2” × 3.1” × 1.6”

With handwritten note from the Folch Collection

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Rear

Cuprite (Chalcotrichite) with Copper

Front
Rear

RH47K8: Small but numerous groups of fibrous Cuprite crystals (Chalcotrichite), very bright and vivid red in color, on laminar growths of native Copper on matrix. The locality, a classic for Chalcotrichite (and for native Copper), makes this specimen even more interesting.
Ray Mine, Ray District, Pinal County, Arizona  USA (±1971)

Specimen size: 12.2 × 7.4 × 4 cm = 4.8” × 2.9” × 1.6”

With handwritten note from the Folch Collection

Copper with Cuprite

RP38F8: Aerial growth of crystals of Cuprite (cube + dodecahedra) with slightly curved edges and on a matrix of native copper crystals. It was a 1961 gift from Mr. Albert Haag, of Tucson, as shown on the record for this one.
Bisbee, Warren, Cochise County, Arizona  USA (±1961)

Specimen size: 3.4 × 2.3 × 1.9 cm = 1.3” × 0.9” × 0.7”

Main crystal size: 0.6 × 0.4 cm = 0.2” × 0.2”

With handwritten note & record from the Folch Collection

Calcite with Brochantite

RB59M3: Group of complex Calcite crystals, translucent and with a intense brilliance, accompanied by centered acicular green Brochantite crystal growths.
This sample was purchased from Hugh A. Ford, of New York, in 1959. The piece is accompanied by a handwritten label and a card (Nr. 2974) from the Folch Collection.
Bisbee, Warren, Cochise County, Arizona  USA (±1959)

Specimen size: 3.7 × 3.3 × 2.7 cm = 1.5” × 1.3” × 1.1”

Main crystal size: 0.7 × 0.6 cm = 0.3” × 0.2”

With handwritten note & record from the Folch Collection

Minor fluorescence long & short UV

Dioptase with Wulfenite

RB27F8: From the Mammoth Mine, no less! A group of Dioptase crystals with magnificent color, on matrix, and with the rare feature of some Wulfenite.
Mammoth Mine, Tiger, Arizona  USA (±1959)

Specimen size: 3.3 × 2.4 × 1.8 cm = 1.3” × 0.9” × 0.7”

With handwritten note & record from the Folch Collection

Calcite fluorescent long & short UV

Wulfenite with Mimetite

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Rear

RJ38H0: A group of laminar crystals of intense orange-yellow color, very bright and partially covered by orange Mimetite. The mine is now an American classic. The piece has an important “pedigree” because it has a label showing a double provenance: The Scott J. Williams collection, of Arizona, and the C.J. Hansen collection where the piece was originally.
Mammoth-St. Anthony Mine, Tiger, Pinal County, Arizona  USA (±1957)

Specimen size: 7.2 × 6.3 × 3.8 cm = 2.8” × 2.5” × 1.5”

Main crystal size: 1.3 × 1.2 cm = 0.5” × 0.5”

With handwritten note from the Folch Collection

Wulfenite

RL87F8: A classic from the Red Cloud Mine. Two crystals that have excellent brilliance and color and that are on matrix. From the 1970s finds, which is when he bought it.
Red Cloud Mine, Silver District, Trigo Mountains, La Paz County, Arizona  USA

Specimen size: 2.5 × 2 × 1.5 cm = 1.0” × 0.8” × 0.6”

With handwritten note & record from the Folch Collection

California

Linarite

RP63M0: Uncommon specimen from a classic locality formed by small acicular and bladed Linarite crystals on matrix.
The specimen is accompanied by a Lidstrom’s label.
Blue Bell claims (Hard Luck claims), Baker, San Bernardino County, California  USA

Specimen size: 5.8 × 4.4 × 2.5 cm = 2.3” × 1.7” × 1.0”

Main crystal size: 0.5 × 0.1 cm = 0.2” × 0.0”

With handwritten note from the Folch Collection

Caledonite with Linarite

RB18G2: A sample from a very uncommon locality that we must not confuse with the better known Mammoth-St. Anthony mine. Caledonite, greenish-blue and vitreous, is with Linarite and they are very abundant on the Limonite matrix. This specimen was purchased from Burminco (George Burnham)
Baker, San Bernardino County, California  USA (±1955)

Specimen size: 8 × 6.3 × 5.2 cm = 3.1” × 2.5” × 2.0”

With handwritten note & record from the Folch Collection

Elbaite

Front
Rear

RC48M2: Very well defined Elbaite, very transparent, with extraordinary colors ranging from a lively red to intense pink from the middle to the upper perfect terminal faces. The specimen which by its aspect does not seem, at first glance, from Pala, is accompanied by a handwritten note from Sr. Folch where one can read that it was collected in Pala (California) by Sr. Folch in person, in 1974, so we give credence to the locality.
Pala Chief Mine, Pala District, San Diego County, California  USA (02/1974)

Specimen size: 4.1 × 1.4 × 1.2 cm = 1.6” × 0.6” × 0.5”

With handwritten note from the Folch Collection

Spodumene (Kunzite)

RC13K9: Floater and doubly terminated Spodumene crystal with multiple terminations at both ends. Pink color, with a strong dichroism.
Pala Chief Mine, Pala District, San Diego County, California  USA (±1962)

Specimen size: 5.2 × 2.8 × 1.2 cm = 2.0” × 1.1” × 0.5”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Front
Rear

Spodumene (Kunzite)

Front
Rear

FB36K0: Floater doubly terminated crystal with rounded terminations. The color is good and especially intense on the extremities of the crystal.
Pala Chief Mine, Pala District, San Diego County, California  USA (±1962)

Specimen size: 5.7 × 2.8 × 1.3 cm = 2.2” × 1.1” × 0.5”

With handwritten note from the Folch Collection

Minor fluorescence with long & short UV

Spodumene (Kunzite)

FA47K0: Floater doubly terminated crystal with dissolution forms and anomaly growths. Its color is exceptionally intense. The original label notes that the specimen was sold to Sr. Folch by Mr. Bouest (or Bouert), from Los Angeles, October 1962.
Pala Chief Mine, Pala District, San Diego County, California  USA (±1962)

Specimen size: 4.1 × 4 × 2.5 cm = 1.6” × 1.6” × 1.0”

With record from the Folch Collection

Minor fluorescence with long & short UV

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Rutile

TX10I8: Prismatic crystal with very well-defined faces and edges. It has translucent reddish zones. The crystal is partially covered by matrix.
Champion Mine, Laws, White Mountains, Mono County, California  USA (±1959)

Specimen size: 1.7 × 1.3 × 1.4 cm = 0.7” × 0.5” × 0.6”

With handwritten note from the Folch Collection

Rutile

TY11I8: Prismatic crystal with very well defined faces and edges. It is sharp, bright and dark brown.
Champion Mine, Laws, White Mountains, Mono County, California  USA (±1959)

Specimen size: 1.5 × 1.5 × 1.3 cm = 0.6” × 0.6” × 0.5”

With handwritten note from the Folch Collection

Inesite

RP49J1: Specimen of good color and good crystallization from this locality, classic for Inesite.
The specimen is accompanied by a Lidstrom’s label.
Hale Creek, Trinity County, California  USA (±1973)

Specimen size: 6.8 × 5.8 × 3.4 cm = 2.7” × 2.3” × 1.3”

Main crystal size: 1.5 × 0.8 cm = 0.6” × 0.3”

With handwritten note from the Folch Collection

Andradite

RE16G6: Crystals reach a considerable size and have an excellent luster. They show equal development of rhombohedral and trapezohedral forms, with some other faces of the cubic system. One of the crystals has a contact on one of its faces. A good sample from this classic American locality.
Calaveras County, California  USA (±1958)

Specimen size: 4.7 × 3.7 × 2.9 cm = 1.9” × 1.5” × 1.1”

Main crystal size: 3.4 × 2.7 cm = 1.3” × 1.1”

With handwritten note & record from the Folch Collection

Cristobalite with Tridymite and Fayalite on Obsidian

RP96S7: Small olive green laminar crystals of Fayalite in a spherical nodule of Cristobalite with Tridymite included in obsidian. The crystals have not been analyzed but the attribution is supported by an original label from Burminco (George Burnham), that we consider trustworthy.
Coso Hot Springs, Coso District, Coso Range, Inyo County, California  USA (±1964)

Specimen size: 7.2 × 4.5 × 4.7 cm = 2.8” × 1.8” × 1.9”

With handwritten note from the Folch Collection

Lawsonite

RX14G2: An old sample from a very uncommon locality that we must not confuse with the type locality (Tiburon Peninsula). Pink crystals are well developed on a Glaucophane matrix. The sample was collected by Scott J. Williams (Scottsdale, Arizona) in 1948 and it was purchased from him by Folch in 1961.
Valley Ford, Sonoma County, California  USA (1948)

Specimen size: 3.5 × 3.2 × 3 cm = 1.4” × 1.3” × 1.2”

Main crystal size: 0.7 × 0.6 cm = 0.3” × 0.2”

With handwritten note & record from the Folch Collection

Colorado

Rhodochrosite with Quartz

RE87H0: A nice group of lenticular crystals with scaled surface, very typical of the historic find in the American Tunnel mine. They are partially covered by micro-crystals of Quartz and their color and luster are magnificent.
American Tunnel, Howardsville, Silverton, Colorado  USA (±1966)

Specimen size: 2.8 × 2.6 × 1.9 cm = 1.1” × 1.0” × 0.7”

Main crystal size: 1.2 × 0.6 cm = 0.5” × 0.2”

With handwritten note from the Folch Collection

Rhodochrosite with Quartz

RA46H0: Two rhombohedral crystals with very sharp faces and edges on a white matrix of small Quartz crystals. Color is good for the locality which we must point out is historic.
American Tunnel, Howardsville, Silverton, Colorado  USA (±1966)

Specimen size: 3.5 × 2 × 1.5 cm = 1.4” × 0.8” × 0.6”

Main crystal size: 1.8 × 1.6 cm = 0.7” × 0.6”

With handwritten note from the Folch Collection

Rhodochrosite on Quartz

RB97F9: Spheroidal aggregates of lenticular crystals with an intense pink color, contrast with the white Quartz matrix. The Color and brightness are better than usual in the samples from this historical mine.
American Tunnel Mine, Howardsville, Silverton, Colorado  USA

Specimen size: 5 × 3.3 × 2 cm = 2.0” × 1.3” × 0.8”

Main crystal size: 1.2 × 1.1 cm = 0.5” × 0.4”

With handwritten note & record from the Folch Collection

Microcline (Amazonite)

RA38F9: In this single crystal the color is magnificent, and the faces are exceptionally well-developed.
Pikes Peak, El Paso County, Colorado  USA (±1926)

Specimen size: 4.5 × 3.9 × 4.3 cm = 1.8” × 1.5” × 1.7”

With handwritten note & record from the Folch Collection

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Top

Hübnerite with Quartz

Front

Rear

RT89J1: Specimen from a classic locality, very different from those from other well known localities for Hübnerite. Crystals are extraordinarily flat and bright and form almost leafy aggregates. The color is bronze-red, typical of its place of origin and contrasts with the white concretions of Quartz.
Adams Mine, Cement Creek, Silverton, San Juan County, Colorado  USA (±1955)

Specimen size: 8.7 × 6.5 × 3.5 cm = 3.4” × 2.6” × 1.4”

With handwritten note from the Folch Collection

Hübnerite

RK70H0: An excellent classic, with very sharp crystals in groups of parallel growths, with the best color and luster and an esthetic contrast with the snowy white matrix. A very difficult specimen to find today.
Adams Mine, Cement Creek, Silverton, San Juan County, Colorado  USA

Specimen size: 5.1 × 3.4 × 4.5 cm = 2.0” × 1.3” × 1.8”

Main crystal size: 3 × 1.6 cm = 1.2” × 0.6”

With handwritten note from the Folch Collection

Front
Rear

Hummerite

RK64J1: The specimen, from the type locality, is very representative of this rare vanadate. It forms deep orange microcrystals on matrix.
We will send the label of the sample, from Minerals Unlimited, Berkeley, California, to the buyer.
Hummer Mine, Paradox Valley, Montrose County, Colorado  USA (±1959)

Specimen size: 4.6 × 4.6 × 2.2 cm = 1.8” × 1.8” × 0.9”

With handwritten note from the Folch Collection

New Jersey

Datolite with Quartz and Pectolite

RB64N4: Group of well defined, bright crystals of good color with fibrous aggregates of Pectolite on the back of the piece. It is from a classic American locality.
The sample is with the label of John S. Albanese, (Union, New Jersey) that we'll send to the buyer.
West Paterson, Passaic County, New Jersey  USA

Specimen size: 4.2 × 3.9 × 2.2 cm = 1.7” × 1.5” × 0.9”

Main crystal size: 0.8 × 0.5 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Datolite

RH63M2: Group of well defined Datolite crystals, very rich in faces, with a light green color and huge size for the locality, a classic for the species.
West Paterson, Passaic County, New Jersey  USA

Specimen size: 5.4 × 3.7 × 2.1 cm = 2.1” × 1.5” × 0.8”

Main crystal size: 2.9 × 1.7 cm = 1.1” × 0.7”

With handwritten note from the Folch Collection

Datolite with Chalcopyrite

RF56K0: Group of crystals with very sharp faces and edges of green color deeper than usual on the samples from this locality, classic for the species. On the surface of Datolite there are small crystals of Chalcopyrite.
New Street Quarry, W. Peterson, Passaic County, New Jersey  USA (±1965)

Specimen size: 8.3 × 6.2 × 4.1 cm = 3.3” × 2.4” × 1.6”

Main crystal size: 1.8 × 1 cm = 0.7” × 0.4”

With handwritten note from the Folch Collection

Rhodonite

RA26H7: Group of prismatic crystals of very well defined faces and edges and a good color, locally with octahedral crystals of Franklinite. Specimens like this are very hard to find.
Franklin, Sussex County, New Jersey  USA (±1970)

Specimen size: 9.3 × 5 × 5.5 cm = 3.7” × 2.0” × 2.2”

Main crystal size: 2.9 × 0.8 cm = 1.1” × 0.3”

With record from the Folch Collection

Willemite (Troostite)

RM61N4: Very well defined, floater and doubly terminated crystal that has good color. An American classic.
Franklin, Sussex County, New Jersey  USA

Specimen size: 2.5 × 2.2 × 1.6 cm = 1.0” × 0.9” × 0.6”

With handwritten note from the Folch Collection

Intense fluorescence short UV & fluorescent long UV

Epidote with Quartz

RL13M2: Doubly terminated Epidote crystal, with parallel growths and very sharp faces and edges. With small Quartz crystals.
Green Monster Mountain, Prince of Wales Island, Alaska  USA (±1954)

Specimen size: 3.6 × 2.1 × 2 cm = 1.4” × 0.8” × 0.8”

Main crystal size: 3.6 × 1.7 cm = 1.4” × 0.7”

With handwritten note from the Folch Collection

Epidote with Quartz

RZ8F8: A Prince of Wales classic. The long crystals of Epidote, apart from the perfect development of the faces, have a good degree of translucence and contrast with the numerous crystals of Quartz. Folch bought this from Al McGuinness in 1972 at Tucson.
Copper Mountain, Prince of Wales Island, Alaska  USA (±1972)

Specimen size: 6 × 5 × 3.3 cm = 2.4” × 2.0” × 1.3”

Main crystal size: 3.8 × 1.6 cm = 1.5” × 0.6”

With handwritten note & record from the Folch Collection

Twinned Rutile

RC37F8: A magnificent cyclic twin from the classic Magnet Cove locality. The perfect twin! A floater as the base has recrystallized. The typed Schortmann’s label also has some handwritten notes made by Folch.
Magnet Cove, Hot Springs County, Arkansas  USA (±1956)

Specimen size: 2.6 × 2.4 × 2.9 cm = 1.0” × 0.9” × 1.1”

With handwritten note & record from the Folch Collection

Grossular with Calcite

RG86G0: Crystals have the dodecahedral form and they are bright and sharp, standing on a Calcite matrix.
The specimen proceeds from the A. Santos collection and it passed to Folch collection in 1952.
Phippsburg, Sagadahoc County, Maine  USA

Specimen size: 5.3 × 4.7 × 3 cm = 2.1” × 1.9” × 1.2”

Main crystal size: 1.3 × 0.9 cm = 0.5” × 0.4”

With handwritten note & record from the Folch Collection

Beryllonite

RA97F8: From the type locality for this rare species. While not well-defined (as is typical for Beryllonite) one can see the faces of the crystal, which is notable for its transparency. A floater.
Stoneham, Oxford County, Maine  USA (±1965)

Specimen size: 2.1 × 1.8 × 1 cm = 0.8” × 0.7” × 0.4”

With handwritten note & record from the Folch Collection

Type locality

Datolite

RD16M2: Very uncommon locality not well represented in collections. Group of well defined Datolite crystals, with a light green color and good luster for the species. The specimen was from the former Scott J. Williams collection and we’ll send this label, which contains some handwritten notes from Mr. Folch, to the buyer.
Hampden Quarry, Westfield, Hampden County, Massachusetts  USA (±1961)

Specimen size: 4.4 × 3.8 × 3.6 cm = 1.7” × 1.5” × 1.4”

Main crystal size: 3.7 × 2 cm = 1.5” × 0.8”

With handwritten note from the Folch Collection

Copper

RP56G0: In the group, the crystals show especially sharp crystal faces. The surface of the faces had resisted the passage of time and they are practically free of any alteration.
Lake Superior, Keweenaw County, Michigan  USA

Specimen size: 2.6 × 1.7 × 1.5 cm = 1.0” × 0.7” × 0.6”

With handwritten note from the Folch Collection

Enargite with Pyrite

RR14K9: Group of prismatic crystals with well defined faces and edges and good luster. On matrix with small octahedral Pyrite crystals.
Butte, Silver Bow County, Montana  USA

Specimen size: 4.5 × 3.4 × 2.5 cm = 1.8” × 1.3” × 1.0”

Main crystal size: 1.0 × 1.0 cm = 0.4” × 0.4”

With handwritten note from the Folch Collection

Enargite with Pyrite

RE36G0: A classic specimen. Prisms of Enargite contrast with complex crystals of Pyrite showing clearly the octahedron and pyritohedron faces.
Folch purchased the specimen directly in Butte, Montana, in 1955.
Butte, Silver Bow County, Montana  USA (±1955)

Specimen size: 3.2 × 3.1 × 2 cm = 1.3” × 1.2” × 0.8”

With handwritten note from the Folch Collection

Enargite with Pyrite

RT36G0: The prisms of Enargite, very bright, contrast with octahedral crystals of Pyrite with a modest development of pyritohedron faces.
Folch purchased the specimen directly in Butte, Montana, in 1955.
Butte, Silver Bow County, Montana  USA (±1955)

Specimen size: 3.5 × 3.3 × 2 cm = 1.4” × 1.3” × 0.8”

With handwritten note & record from the Folch Collection

Olivenite with Pitticite

RX92M0: Classic acicular olive green Olivenite crystals, very bright, and on a rocky matrix with Pitticite. This specimen is accompanied by a handwritten Folch label and the collection card (Nr. 7344).
Majuba Hill Mine, Antelope, Pershing County, Nevada  USA (±1961)

Specimen size: 5.8 × 3.3 × 2.8 cm = 2.3” × 1.3” × 1.1”

Main crystal size: 0.4 × 0.1 cm = 0.2” × 0.0”

With handwritten note & record from the Folch Collection

Herderite

RE67F8: A rarity. The crystal, even though it is not well terminated on the rear, is well developed and is quite large for the locality, which in turn is a classic one for US mineralogy. It is a floater.
Rumney, Grafton County, New Hampshire  USA (±1967)

Specimen size: 3 × 2 × 1.5 cm = 1.2” × 0.8” × 0.6”

With handwritten note & record from the Folch Collection

Hewettite on Gypsum

RJ36F8: A superb formation of fibrous crystals that have hints of gold and bronze and are on gypsum. Collected by Sr. Folch in October 1959.
Homestake Mine, Grants District, New Mexico  USA (1959)

Specimen size: 4.4 × 4.1 × 1.9 cm = 1.7” × 1.6” × 0.7”

With handwritten note & record from the Folch Collection

Dravite

RZ62M0: This crystal, from a classic locality from the New York state, is formed by a short prism and the terminal flattened rhombohedron faces, which are well defined and show a good luster. Although it looks damaged in two places, one of them is a natural hole with crystal faces inside. The other one effectively is a ding.
This specimen was bought by Mr. Folch in 1959 and it is accompanied by a handwritten label and the collection card (Nr. 5060)

Pierrepont, St. Lawrence County, New York  USA (±1959)

Specimen size: 3.8 × 3.5 × 3.2 cm = 1.5” × 1.4” × 1.3”

With handwritten note & record from the Folch Collection

Front
Rear

Zircon

RT8N4: Small but very well defined and doubly terminated crystal, formed by the faces of the prism and of a dipyramid. We apologize for not offering more information about the locality. The original manuscript label simply indicates North Carolina.
North Caroline  USA

Specimen size: 0.8 × 0.6 × 0.5 cm = 0.3” × 0.2” × 0.2”

With handwritten note from the Folch Collection

Intense fluorescence short UV & fluorescent long UV

Sphalerite with Pyrite and Marcasite

RX96P8: From a classic American locality. The Sphalerite crystals are complex with deep red color and good transparency. These crystals were named "Ruby Jack". They are implanted on a very thin matrix and are partially coated by sharp, well defined, crystals of Marcasite. Folch's records indicate that the sample was acquired in Tucson in 1959.
Picher Field, Tri-State District, Ottawa County, Oklahoma  USA (±1959)

Specimen size: 10.8 × 8.3 × 2.9 cm = 4.3” × 3.3” × 1.1”

Main crystal size: 3.6 × 2.9 cm = 1.4” × 1.1”

With handwritten note & record from the Folch Collection

MEXICO - CANADA

Mexico

Axinite-(Fe)

RA58N4: The locality, due to its rarity, is the most notable about this piece which has an excellent color.
With a label from Shale`s(Los Angeles) that we'll send to the buyer.
Trinidad, Baja California  Mexico

Specimen size: 5.7 × 3.5 × 1 cm = 2.2” × 1.4” × 0.4”

With handwritten note from the Folch Collection

Vesuvianite

RK60M9: Floater and doubly terminated crystal of very well defined faces and edges. It is formed by two prisms 45 degrees to each other, and a dipyramid.
Sierra de Cruces, Municipio de Sierra Mojada, Coahuila  Mexico (±1970)

Specimen size: 2.9 × 2.1 × 1.9 cm = 1.1” × 0.8” × 0.7”

With handwritten note from the Folch Collection

Vesuvianite with Grossular

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RN16K9: A group of Vesuvianite crystals from a classic locality, with well defined faces and edges, most of them doubly terminated. They are formed by two prisms and a pyramid on the terminal faces.
Sierra de Cruces, Municipio de Sierra Mojada, Coahuila  Mexico (±1970)

Specimen size: 4.8 × 3.5 × 2.8 cm = 1.9” × 1.4” × 1.1”

Main crystal size: 2.8 × 1.6 cm = 1.1” × 0.6”

With handwritten note from the Folch Collection

Doubly terminated Vesuvianite

RC63P8: A single equidimensional Vesuvianite crystal of yellowish brown color. Its cubical aspect is due to two short prisms and a dipyramid plus the terminal pinacoid. On the surface of some of its faces there are small groups of dodecahedral crystals of Grossular.
Sierra de Cruces, Municipio de Sierra Mojada, Coahuila  Mexico

Specimen size: 3.1 × 3 × 3.1 cm = 1.2” × 1.2” × 1.2”

With handwritten note from the Folch Collection

Grossular

RK16G2: A group of dodecahedral crystals perfectly defined, with a good luster and a color quite different than usual for the Grossular from this locality.
Sierra de Cruces, Municipio de Sierra Mojada, Coahuila  Mexico

Specimen size: 3.1 × 3 × 2.9 cm = 1.2” × 1.2” × 1.1”

With handwritten note from the Folch Collection

Polybasite with Chalcopyrite and Quartz

RD46H3: Group of very sharp laminar crystals with very marked triangular growth figures on the pinacoid faces. Chalcopyrite growths and small white crystals of Quartz enhance the esthetics of the specimen.
The specimen is accompanied by a Lidstrom’s label, and we will give the buyer also a copy of the analysis of the Polybasite.
Chihuahua  Mexico

Specimen size: 2.8 × 2.7 × 2.4 cm = 1.1” × 1.1” × 0.9”

With handwritten note from the Folch Collection

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Pyrrhotite with Dolomite

RA46L9: Group of prismatic Pyrrhotite crystals with excellent terminations, partially covered by small Dolomite crystals.
The piece is accompanied by a handwritten label and a card (nr. 9812) from the Folch Collection, where we can read that it was purchased in 1966.
Santa Eulalia, Aquiles Serdán, Chihuahua  Mexico (1966)

Specimen size: 12.6 × 7.4 × 4.4 cm = 5.0” × 2.9” × 1.7”

Main crystal size: 1.5 × 1.4 cm = 0.6” × 0.6”

With handwritten note & record from the Folch Collection

Wulfenite with Dolomite

RH6M3: Two huge size Wulfenite crystals with a toasted honey color on the edges and yellow pinacoidal faces. With a small matrix.
This sample was purchased from John S. Albanese, of New Jersey.The piece is accompanied by a handwritten label with the notes from Mr. Folch.
Mina Ahumada, Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico

Specimen size: 3.3 × 3.1 × 2.4 cm = 1.3” × 1.2” × 0.9”

Main crystal size: 2.9 × 2.9 cm = 1.1” × 1.1”

With handwritten note from the Folch Collection

Wulfenite with Calcite

RQ86S7: Prismatic crystals quite more elongated than usual on the samples from Los Lamentos, with neat pinacoidal terminations, very bright and an orange color with darker areas in the center of the prism. With Calcite and on matrix.
Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico (±1964)

Specimen size: 10.1 × 6.7 × 2 cm = 4.0” × 2.6” × 0.8”

Main crystal size: 1.1 × 0.5 cm = 0.4” × 0.2”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Wulfenite with Calcite

RJ46H8: The crystal is very thick, almost prismatic, and has very well-defined faces and edges. Its color is very good and the aerial position of the crystal on the matrix make the sample very esthetic.
Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico (1960)

Specimen size: 4.5 × 4.3 × 4 cm = 1.8” × 1.7” × 1.6”

Main crystal size: 1.1 × 0.8 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

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Wulfenite

RX96F8: The crystals, with perfect color and brilliance, have a elongated form that is not common among examples from Los Lamentos.
Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico

Specimen size: 6.3 × 4.7 × 4 cm = 2.5” × 1.9” × 1.6”

Main crystal size: 0.6 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Wulfenite with Calcite

RC52H3: Group of tabular crystals very sharp, with excellent color and luster and contrasting with a white matrix.
We offer a label of the first supplier, Barney Goff, from New Hope, with autographed notes of Sr. Folch.
Mina Ahumada, Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico (±1973)

Specimen size: 11 × 7 × 4 cm = 4.3” × 2.8” × 1.6”

Main crystal size: 1.3 × 1.3 cm = 0.5” × 0.5”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Wulfenite

RX37J1: Group of bipyramidal acute crystals, much of them doubly terminated, very well defined and with intense deep orange color. Although the locality on original the label is Tiger, we authenticated the specimen as coming from Los Lamentos, so we give this last locality as correct.
We will send the label of the sample, from the Ernest Windisch collection (World Wide Minerals), Philipsburg, Québec, to the buyer.
Sierra de Los Lamentos, Ahumada, Chihuahua  Mexico

Specimen size: 7.3 × 4.4 × 3.5 cm = 2.9” × 1.7” × 1.4”

Main crystal size: 0.8 × 0.3 cm = 0.3” × 0.1”

With handwritten note from the Folch Collection

Vanadinite with Calcite

RR27S7: Spindled prismatic crystals of Vanadinite. They are very acute and most of them have hollowed growths, their color is reddish brown and they are with Calcite on matrix. It is an historical sample, that comes from the Elbert Barron collection, as is shown on the original label and collection card, and it was purchased by Folch at El Paso, in 1959.
Mina San Carlos (Mina Apex), San Carlos, Manuel Benavides, Chihuahua  Mexico (±1959)

Specimen size: 8.2 × 6.2 × 5.2 cm = 3.2” × 2.4” × 2.0”

Main crystal size: 0.4 × 0.2 cm = 0.2” × 0.1”

With handwritten note & record from the Folch Collection

Calcite minor fluorescence long & short UV

Silver with Calcite

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RE27G0: An esthetic specimen, very aerial, in which are some crystals are elongated and some of them show the twin plane clearly, in a Calcite matrix.
Sr. Folch purchased the specimen in 1962, but, as documentation explains, it was probably mined around 1910.
Batopilas, Chihuahua  Mexico (±1910)

Specimen size: 5.9 × 3.5 × 3.3 cm = 2.3” × 1.4” × 1.3”

Main crystal size: 1.7 × 0.2 cm = 0.7” × 0.1”

With handwritten note & record from the Folch Collection

Calcite fluorescent long & short UV

Adamite on Limonite

RV13L9: Group of well defined and very bright Adamite crystals. A gentle yellow to greenish color, on a Limonite matrix.
The specimen is with a commercial label of John S. Albanese, from New Jersey. We will send the label to the buyer.
Mina Ojuela, Mapimí, Municipio de Mapimí, Durango  Mexico

Specimen size: 4.8 × 3.5 × 2.8 cm = 1.9” × 1.4” × 1.1”

Main crystal size: 0.6 × 0.5 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Very fluorescent long & short UV

Adamite

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RD76H7: The color and the esthetics of the specimen are very good. Crystals, small and very bright, form spheroidal growths on a matrix of Limonite.
Mapimí, Municipio de Mapimí, Durango  Mexico

Specimen size: 4.7 × 4.2 × 3.2 cm = 1.9” × 1.7” × 1.3”

With record from the Folch Collection

Extremely fluorescent long & short UV

Adamite

RB63P8: "Bow tie" growth of elongated crystals with clear color zoning, white at the center and a beautiful yellow elsewhere. The sample has an extraordinary fluorescence, very much stronger than usual.
Mina Ojuela, Mapimí, Municipio de Mapimí, Durango  Mexico

Specimen size: 4.3 × 2.5 × 3.4 cm = 1.7” × 1.0” × 1.3”

With handwritten note from the Folch Collection

Extremely fluorescent long & short UV

Adamite

RT36H0: A pleasant group of crystals of excellent color and luster and completely undamaged, on the Limonite matrix typical of Mapimí specimens.
Mapimí, Municipio de Mapimí, Durango  Mexico

Specimen size: 5 × 3.5 × 3.7 cm = 2.0” × 1.4” × 1.5”

With handwritten note from the Folch Collection

Extremely fluorescent long & short UV

Fluorapatite

RD56F8: A classic crystal with excellent color and transparency, and on matrix. Folch bought it in Cerro del Mercado, Durango, in September 1956.
Cerro del Mercado, Durango  Mexico (1956)

Specimen size: 4.7 × 3.6 × 3.2 cm = 1.9” × 1.4” × 1.3”

Main crystal size: 2.2 × 1.1 cm = 0.9” × 0.4”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Quartz (Amethyst)

FK46K0: Classic group of crystals from this locality, in this case very transparent and with an excellent color, on a small matrix. The sample is very esthetic.
Piedra Parada, Las Vigas, Veracruz  Mexico

Specimen size: 5.3 × 4.5 × 4.2 cm = 2.1” × 1.8” × 1.7”

Main crystal size: 3.6 × 1.2 cm = 1.4” × 0.5”

With handwritten note from the Folch Collection

Quartz (Amethyst)

RC99P8: Probably this is one of the first Amethyst samples from Las Vigas because the original label indicates that it was acquired in Tucson in 1968 and (erroneously) 'Guerrero' as the locality. It is a very aerial group of crystals, some of them doubly terminated, with a very well marked color zoning. Luster and transparency are excellent.
Piedra Parada, Las Vigas, Veracruz  Mexico (±1968)

Specimen size: 9 × 5.7 × 2.9 cm = 3.5” × 2.2” × 1.1”

Main crystal size: 2.4 × 1.2 cm = 0.9” × 0.5”

With handwritten note from the Folch Collection

Calcite on Quartz

RR46G0: Excellent representation of Calcite from Guanajuato. The specimen is especially esthetic due to the aerial position of flat rhombohedral crystals, with a lenticular habit, on a matrix of lightly violet Quartz.
Guanajuato, Guanajuato  Mexico (±1967)

Specimen size: 5.7 × 5.3 × 3.6 cm = 2.2” × 2.1” × 1.4”

Main crystal size: 3.3 × 3.1 cm = 1.3” × 1.2”

With handwritten note & record from the Folch Collection

Calcite very fluorescent long & short UV

Clinozoisite with Quartz and Garnet

RF6T5: Radial aggregates of acicular crystals with intense pink color, a shade that is well known but uncommon for the species. They are on a matrix with Quartz and garnet (probably Grossular).
The sample is with its Folch collection card and the Burminco (George Burnham) label that we'll send to the buyer.
Álamos, Municipio de Álamos, Sonora  Mexico

Specimen size: 7.4 × 5.5 × 4 cm = 2.9” × 2.2” × 1.6”

With handwritten note & record from the Folch Collection

Tellurite with Quartz

TK26J1: Excellent miniature of this rare tellurium oxide. It is in groups of deep yellow acicular crystals in vugs on a Quartz matrix.
We will send the label of the sample, from Scott Williams Mineral Company, Scottsdale, Arizona, to the buyer.
Moctezuma Mine, Moctezuma, Sonora  Mexico

Specimen size: 2.9 × 3.1 × 2.4 cm = 1.1” × 1.2” × 0.9”

Main crystal size: 0.2 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Stibiconite

RE27S7: A Stibiconite pseudomorph after a Stibnite crystal, whose faces and edges are quite better defined than usual on the samples from Real de Catorce, and it has a more “fresh”, less rough, appearance than usual.
Real de Catorce, Catorce, San Luis Potosí  Mexico

Specimen size: 14.8 × 2.5 × 1.8 cm = 5.8” × 1.0” × 0.7”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

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Gahnite with Quartz

RE6K9: Well defined blue-grayish octahedral crystals on a Quartz matrix.
Bossost, Val d'Aran, Lleida  Spain

Specimen size: 5.0 × 4.0 × 3.4 cm = 2.0” × 1.6” × 1.3”

Main crystal size: 0.6 × 0.5 cm = 0.2” × 0.2”

With handwritten note & record from the Folch Collection

Cobaltian Calcite

RC98Q5: Polished section with concretionary growths with excellent color, very deep. Though we don’t usually present polished samples, in this case we made an exception because of the unusual quality of the color of the Calcite and the collection of precedence, the mine (now totally abandoned and collapsed) was precisely exploited to obtain such pieces.
Mina Solita, Peramea, Baix Pallars, Lleida  Spain (±1978)

Specimen size: 14.3 × 11.2 × 1.7 cm = 5.6” × 4.4” × 0.7”

With handwritten note from the Folch Collection

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Fluorite

RM14P1: Group of cubical crystals of sharp, very well defined, faces and edges of slightly greenish yellow color. The sample, with the edges areas more transparent than the central areas of the faces, is absolutely representative of this Catalan locality.
Sant Marçal, Montseny, Girona  Spain

Specimen size: 11.2 × 11 × 3.2 cm = 4.4” × 4.3” × 1.3”

Main crystal size: 2.7 × 1.7 cm = 1.1” × 0.7”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Wulfenite (Chillagite)

RD10K9: Excellent miniature, very representative of this rare variety that is an intermediate member of the Wulfenite-Stolzite series. From a Catalan classic locality close to Barcelona. Crystals show a lenticular appereance.
Mina Teresita, Sant Fost de Campsentelles, Vallès Oriental, Barcelona  Spain

Specimen size: 2.3 × 2.1 × 0.8 cm = 0.9” × 0.8” × 0.3”

With handwritten note from the Folch Collection

Wulfenite (Chillagite)

RC59K9: Excellent miniature, very representative of this rare variety that is an intermediate member of the Wulfenite-Stolzite series. From a Catalan classic locality close to Barcelona. Crystals show a lenticular appearance.
Mina Teresita, Sant Fost de Campsentelles, Vallès Oriental, Barcelona  Spain

Specimen size: 2.4 × 2.0 × 1.4 cm = 0.9” × 0.8” × 0.6”

With handwritten note from the Folch Collection

Wulfenite (Chillagite) with Barite

RB12M9: Thin laminar crystals of this rare variety of Wulfenite, rich in tungsten, that contrast with the white matrix of Barite. The locality is a classic of Spanish mineralogy and the samples are very scarce.
Sant Fost de Campsentelles, Vallès oriental, Barcelona  Spain

Specimen size: 2.7 × 2.1 × 1.7 cm = 1.1” × 0.8” × 0.7”

With handwritten note from the Folch Collection

Wulfenite (Chillagite)

RA60K9: Excellent miniature, very representative of this rare variety that is an intermediate member of the Wulfenite-Stolzite series. From a Catalan classic locality close to Barcelona. Crystals show a lenticular appereance.
Mina Teresita, Sant Fost de Campsentelles, Vallès Oriental, Barcelona  Spain

Specimen size: 3.4 × 2.3 × 1.2 cm = 1.3” × 0.9” × 0.5”

With handwritten note from the Folch Collection

Wulfenite (Chillagite) with Fluorite and Galena

RZ9P1: Creamy beveled laminar crystals, some of them very well defined, of this very rare Wulfenite variety, rich in tungsten. The crystals contrast with a matrix of clear greenish Fluorite with nucleus of Galena.
Sant Fost de Campsentelles, Vallès oriental, Barcelona  Spain (01/1955)

Specimen size: 7.8 × 5.9 × 4.3 cm = 3.1” × 2.3” × 1.7”

Main crystal size: 1.1 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Cerussite with Galena

RC62P1: Very well defined twins of flat prismatic crystals whose color is between white and clear brown, and they are on a massive Galena matrix. We especially note that the mine is well documented on the label, which is unusual on most of the samples of the epoch.
Mina Raimunda, El Molar, Priorat, Tarragona  Spain (±1923)

Specimen size: 6.3 × 5.3 × 3.8 cm = 2.5” × 2.1” × 1.5”

Main crystal size: 0.6 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Cerussite with Galena

RB63P1: Very well defined twins of flat prismatic crystals whose color is between white and clear brown, and they are on a massive Galena matrix. We especially note that the mine is well documented on the label, which is unusual on most of the samples of the epoch.
Mina Raimunda, El Molar, Priorat, Tarragona  Spain (±1923)

Specimen size: 7 × 3.6 × 5.1 cm = 2.8” × 1.4” × 2.0”

Main crystal size: 0.7 × 0.2 cm = 0.3” × 0.1”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Cerussite with Galena

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FQ11K0: The sample, mined in 1959, forms groups of twinned crystals from the old oxidation zone of this historic and classic Spanish locality. The matrix is basically of massive Galena and Cerussite with Limonite.
Mina Raimunda, El Molar, Priorat, Tarragona  Spain (1959)

Specimen size: 7.5 × 4.5 × 4.4 cm = 3.0” × 1.8” × 1.7”

Main crystal size: 0.5 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Fluorescent long UV & minor fluorescence short UV

Cerussite with Galena

RK64P1: Butterfly and cyclic twins of well defined crystals on a massive Galena matrix. We especially note that the mine is well documented on the label, which is unusual on most of the samples of the epoch. The label notes the year of the find of the specimen - 1923.
Mina Raimunda, El Molar, Priorat, Tarragona  Spain (±1923)

Specimen size: 7.9 × 7.5 × 5.2 cm = 3.1” × 3.0” × 2.0”

Main crystal size: 0.7 × 0.5 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Dolomite

RZ46R6: Aerial group of translucent and bright rhombohedral crystals. The Folch collection records note that is was collected by F. Coma October 1959.
Cantera Asturreta, Eugui, Esteríbar, Navarra  Spain

Specimen size: 5.8 × 3.8 × 3.9 cm = 2.3” × 1.5” × 1.5”

Main crystal size: 3.1 × 2.3 cm = 1.2” × 0.9”

With handwritten note & record from the Folch Collection

Dolomite

RQ46Q5: Twinned rhombohedral crystals with the usual quality for Eugui, with very well defined faces and edges, from transparent to translucent and very bright. A Spanish classic.
Cantera Asturreta, Eugui, Esteríbar, Navarra  Spain (1959)

Specimen size: 6.9 × 4.4 × 2.7 cm = 2.7” × 1.7” × 1.1”

Main crystal size: 3.4 × 3.3 cm = 1.3” × 1.3”

With handwritten note from the Folch Collection

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Dolomite

RP17F9: The crystals of this aggregate have great clarity and brightness, with inner iridescent inclusions. The interpenetration twin is apparent in different zones on the specimen.
Cantera Asturreta, Eugui, Esteríbar, Navarra  Spain (1968)

Specimen size: 7 × 5 × 3.7 cm = 2.8” × 2.0” × 1.5”

With handwritten note from the Folch Collection

Twinned Dolomite

FY47K0: Twin of two rhombohedral crystals of very well defined faces and edges, bright and translucent. The original label indicates that it was a gift from Carlos Díaz de Mauriño, from Pamplona, in 1967, to Sr. Folch.
Cantera Asturreta, Eugui, Esteríbar, Navarra  Spain (±1967)

Specimen size: 7.7 × 6.1 × 6 cm = 3.0” × 2.4” × 2.4”

Main crystal size: 3.8 × 3.7 cm = 1.5” × 1.5”

With handwritten note & record from the Folch Collection

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Doubly terminated Calcite

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RZ11H9: The sample mined the August 1960, must be one of the first known from the locality. Doubly terminated, a twin of two trapezohedrons with rhombohedrons forming the terminations.
Minas de La Florida, La Florida, Cantabria  Spain (06/1960)

Specimen size: 5 × 3.7 × 2.8 cm = 2.0” × 1.5” × 1.1”

With handwritten note from the Folch Collection

Minor fluorescence short UV

Sphalerite with Dolomite

RX14P1: Well defined crystals, bright and of good color and transparency, with small coatings of white Dolomite, on matrix.
Mina Las Manforas, Áliva, Picos de Europa, Cantabria  Spain

Specimen size: 4.2 × 3.6 × 2.8 cm = 1.7” × 1.4” × 1.1”

Main crystal size: 1 × 0.8 cm = 0.4” × 0.3”

Sphalerite with Calcite and Dolomite

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RM66P8: Complex crystals of Sphalerite of dark honey color and good transparency, partially coated by small crystals of Dolomite and with doubly terminated crystals of Calcite (a species uncommon at this locality in well-formed crytals), with the shape of a scalenohedron but composed of polycrystalline growths of the prism and a terminal rhombohedron.
Mina Las Mánforas, Áliva, Picos de Europa, Cantabria  Spain

Specimen size: 6.7 × 5.7 × 4.7 cm = 2.6” × 2.2” × 1.9”

With handwritten note from the Folch Collection

Sphalerite

RF86L9: Very sharp Sphalerite crystal with some curved edges. A translucent sample with a good honey to red intense color.
The piece is accompanied by a handwritten label from the Folch collection.
Mina Las Manforas, Áliva, Picos de Europa, Cantabria  Spain

Specimen size: 7.3 × 6 × 3 cm = 2.9” × 2.4” × 1.2”

With handwritten note from the Folch Collection

Sphalerite with Dolomite

RH89K9: Complex Sphalerite crystal group, with multiple faces and curved edges. The color is excellent and contrasts with the snowy white Dolomite matrix.
Mina Las Manforas, Áliva, Picos de Europa, Cantabria  Spain (±1968)

Specimen size: 10.1 × 7.5 × 6.5 cm = 4.0” × 3.0” × 2.6”

Main crystal size: 5.7 × 5.3 cm = 2.2” × 2.1”

With handwritten note from the Folch Collection

Doubly terminated Calcite with Sphalerite

RF64L3: Calcite crystal, with a small but aerial Sphalerite crystal, not well defined but complete. Calcite from this mine is not common in this well defined shape.
Mina Las Manforas, Áliva, Picos de Europa, Cantabria  Spain (±1975)

Specimen size: 5.7 × 4.1 × 3 cm = 2.2” × 1.6” × 1.2”

Main crystal size: 1 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Tyrolite

RT9P1: Aggregates of thin laminar crystals of Tyrolite. They are bright and the color is very deep. On matrix with Chrysocolla and Tetrahedrite-Tennantite.
On the back of the label it is cited that it was collected by D. Joaquín Folch on the dumps of the mine in 1960.
Mina Delfina, Ortiguero, Cabrales, Asturias  Spain (04/1960)

Specimen size: 5 × 4.7 × 3.2 cm = 2.0” × 1.9” × 1.3”

With handwritten note & record from the Folch Collection

Tyrolite

RV8P1: Deep green aggregates of thin laminar crystals on dark brown matrix.
Mina Delfina, Ortiguero, Cabrales, Asturias  Spain (04/1960)

Specimen size: 5.4 × 4.3 × 2.9 cm = 2.1” × 1.7” × 1.1”

With handwritten note from the Folch Collection

Tyrolite

RP96R0: Radial leafy growths of bright green laminar crystals of Tyrolite that contrast with the darker rocky matrix.
Mina Delfina, Ortiguero, Cabrales, Asturias  Spain (1959)

Specimen size: 7.2 × 4.2 × 4.7 cm = 2.8” × 1.7” × 1.9”

With handwritten note & record from the Folch Collection

Tyrolite with Chrysocolla and Azurite

FT6K0: Leafy groups of laminar crystals on matrix, with Chrysocolla and vugs of small crystals of Azurite.
Mina Delfina, Ortiguero, Cabrales, Asturias  Spain (1981)

Specimen size: 7.9 × 6.2 × 5 cm = 3.1” × 2.4” × 2.0”

Main crystal size: 0.8 × 0.4 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Cinnabar

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RR16I7: Parallel growth of rhombohedral crystals. They have a considerable size for the locality and present good color and luster, even considering the long time passed since the specimen was mined.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1979)

Specimen size: 2 × 1.4 × 1.1 cm = 0.8” × 0.6” × 0.4”

With handwritten note from the Folch Collection

Cinnabar with Dolomite

RQ17K9: Excellent miniature, very representative of the Almadén specimens. Showing well defined rhombohedron crystals, some of them with parallel growth. On matrix.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1978)

Specimen size: 3.0 × 1.8 × 1.4 cm = 1.2” × 0.7” × 0.6”

Main crystal size: 1.0 × 0.8 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

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Cinnabar

RF47F8: A splendid miniature with perfect growth of the crystals, in which the faces of the rhombohedron dominate. The color and brilliance are excellent. Folch found it at the Almadén Mine in 1923.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (1923)

Specimen size: 3.1 × 2 × 1.5 cm = 1.2” × 0.8” × 0.6”

Main crystal size: 0.4 × 0.4 cm = 0.2” × 0.2”

With handwritten note & record from the Folch Collection

Cinnabar

RK64L3: Well defined and bright Cinnabar crystals, some of them very aerial, with prominent rhombohedral faces with curvatures and fine striations. We can see small drops of liquid mercury on the matrix.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1964)

Specimen size: 3.4 × 3.1 × 2.2 cm = 1.3” × 1.2” × 0.9”

Main crystal size: 0.4 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Cinnabar with Dolomite

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RQ14H8: Crystals, being small, have good color, luster and transparency and they strongly contrast with the white Dolomite where they are placed.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain

Specimen size: 4 × 3.4 × 2.9 cm = 1.6” × 1.3” × 1.1”

Main crystal size: 0.4 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Cinnabar with Dolomite

RM14L3: Well formed Cinnabar crystals in a vug, with Quartz and Dolomite. The Folch label advises about the presence of Calomel (Calomelanos) as “small crystals inside the geode” with brown yellowish tones, but after analyses it has been demonstrated that it is Dolomite.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1979)

Specimen size: 4 × 3.8 × 2.5 cm = 1.6” × 1.5” × 1.0”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Cinnabar with Barite

RV6L9: Group of Cinnabar crystals with well defined faces and edges, with a honey-colored Barite crystal (that we have analyzed) on a black quartzite matrix and grey Quartz.
The piece is accompanied by a handwritten label from the Folch collection.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1973)

Specimen size: 5 × 3.8 × 3.3 cm = 2.0” × 1.5” × 1.3”

Main crystal size: 0.6 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Cinnabar with Calcite

RM36I7: Groups of small crystals of excellent color and luster that contrast with a matrix rich in Quartz.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain

Specimen size: 5.8 × 4 × 3.3 cm = 2.3” × 1.6” × 1.3”

With handwritten note from the Folch Collection

Cinnabar with Quartz

RV7I2: The crystal has a considerable size for the locality and it has very well defined faces and edges, on matrix and with small Quartz crystals. A classic.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (±1980)

Specimen size: 5.8 × 5 × 3.3 cm = 2.3” × 2.0” × 1.3”

Main crystal size: 0.6 × 0.6 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Cinnabar

RE76F8: The crystals are small but the color and brilliance are exceptional. Folch found it at the Almadén Mine in 1923.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain (1923)

Specimen size: 6.2 × 4.2 × 3 cm = 2.4” × 1.7” × 1.2”

Main crystal size: 0.4 × 0.3 cm = 0.2” × 0.1”

With handwritten note & record from the Folch Collection

Cinnabar with Quartz

RQ7K9: Lively red crystals, good brilliance, that contrast on a snowy Quartz matrix.
Pozo de San Teodoro, Almadén, Ciudad Real  Spain

Specimen size: 7.2 × 4.5 × 1.4 cm = 2.8” × 1.8” × 0.6”

Main crystal size: 0.5 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Pyromorphite

RG48F9: An aerial and esthetical group with dramatic color zoning near the top. The crystals are large and have a few common characteristics of the Horcajo specimens. The tips, even considering a beginning of cone growth, are perfectly flat. Another historical sample, with a lot of years on its back, when Sr. Folch purchased it in 1923 from a miner at the locality.
El Horcajo, Ciudad Real  Spain (1923)

Specimen size: 3 × 2.3 × 1.7 cm = 1.2” × 0.9” × 0.7”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Pyromorphite

Front

Rear

RA88G0: A typical specimen from El Horcajo. Floating, with groups of parallel prismatic crystals forming walls. Crystals are grass green colored, with typical zones and changes of color near the tips.
El Horcajo, Ciudad Real  Spain

Specimen size: 5.7 × 2.8 × 2.3 cm = 2.2” × 1.1” × 0.9”

With handwritten note from the Folch Collection

Pyromorphite

RK88G2: Groups of prismatic crystals with the edges lightly curved. Some crystals are partially covered with and have inclusions of a mineral described as Litharge on the label, but we can't confirm that because we have not analyzed the mineral to certify it.
El Horcajo, Ciudad Real  Spain

Specimen size: 5.9 × 4.6 × 3.3 cm = 2.3” × 1.8” × 1.3”

Main crystal size: 1 × 0.3 cm = 0.4” × 0.1”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Freibergite with Siderite and Quartz

RY14R0: Small but sharp and extraordinarily bright crystals of Freibergite implanted in small vugs coated by small crystals of Quartz and on a matrix very rich with Siderite. The species has been analyzed and we'll send a copy of the analysis to the buyer.
↓105 m. Mina San Ignacio, Hiendelaencina, Guadalajara  Spain (05/1950)

Specimen size: 4.2 × 2.4 × 2.9 cm = 1.7” × 0.9” × 1.1”

Main crystal size: 0.1 × 0.1 cm = 0.0” × 0.0”

With handwritten note from the Folch Collection

Freibergite with Siderite and Quartz

RQ14R0: Small but sharp crystals of Freibergite with excellent luster, implanted in small vugs coated by small crystals of Quartz and Chalcopyrite on a matrix very rich with Siderite. The species has been analyzed and we'll send a
copy of the analysis to the buyer.
↓105 m. Mina San Ignacio, Hiendelaencina, Guadalajara  Spain (05/1950)

Specimen size: 3.1 × 3.1 × 1.6 cm = 1.2” × 1.2” × 0.6”

Main crystal size: 0.1 × 0.1 cm = 0.0” × 0.0”

With handwritten note from the Folch Collection

Pyrargyrite

Front
Top

RD89F9: The crystals have a good size and are better defined than usual in the famous and very desired specimens from the Hiendelaencina mines. The top faces clearly show trigonal geometry. The group is a floater.
Mina Santa Cecilia, Hiendelaencina, Guadalajara  Spain

Specimen size: 2.3 × 1.5 × 1.5 cm = 0.9” × 0.6” × 0.6”

Main crystal size: 1.3 × 1.2 cm = 0.5” × 0.5”

With handwritten note from the Folch Collection

Pyrargyrite with Siderite and Quartz

RB86K0: Small crystals of faces better defined than usual, on a matrix of Siderite and Quartz. This classic, classic, specimen has been chemically analyzed and we’ll send a copy of the analysis to the buyer of the specimen.
Mina Santa Cecilia, Hiendelaencina, Guadalajara  Spain

Specimen size: 7.3 × 3.8 × 5.5 cm = 2.9” × 1.5” × 2.2”

Main crystal size: 0.2 × 0.1 cm = 0.1” × 0.0”

With handwritten note from the Folch Collection

Stephanite with Miargyrite

RH37F8: From the Spanish locality that is a classic for its excellent silver sulfosalts. A small, long crystal with perfect definition of the faces and accompanied by Miargyrite, both on the matrix typical for the locality. Folch found this at the Teresa Mine in 1950.
Mina Teresa, Hiendelaencina, Guadalajara  Spain (05/1950)

Specimen size: 2.9 × 1.4 × 1.3 cm = 1.1” × 0.6” × 0.5”

Main crystal size: 0.2 × 0.1 cm = 0.1” × 0.0”

With handwritten note & record from the Folch Collection

Twinned Orthoclase

FC58K0: Floater crystal, complete and doubly terminated, that forms a very well defined Carlsbad twin.
Zarzalejo, Madrid  Spain

Specimen size: 3.5 × 3.1 × 1.5 cm = 1.4” × 1.2” × 0.6”

With handwritten note from the Folch Collection

Front
Rear

Twinned Orthoclase

Front
Rear

FD9K0: Floater crystal, complete and doubly terminated, that forms a very well defined Carlsbad twin.
Zarzalejo, Madrid  Spain

Specimen size: 3.9 × 3 × 1.6 cm = 1.5” × 1.2” × 0.6”

With handwritten note from the Folch Collection

Almandine

RC11P1: Excellent sample both for its size and for the definition of the dodecahedral form.
The label shows that it was collected by Mr. Marçal Lloria in 1973.
Peña Grajera, Hornachuelos, Córdoba  Spain (±1973)

Specimen size: 7.6 × 6.4 × 6.5 cm = 3.0” × 2.5” × 2.6”

Main crystal size: 6.5 × 5.5 cm = 2.6” × 2.2”

With handwritten note & record from the Folch Collection

Front
Side

Cassiterite with Scheelite

RZ6G2: The locality is very poorly-known and well crystallized samples are very scarce. In this specimen, Cassiterite forms a perfectly defined elbow twin, in a matrix very rich with Scheelite.
Montoro, Córdoba  Spain

Specimen size: 4 × 2.8 × 2.3 cm = 1.6” × 1.1” × 0.9”

Main crystal size: 0.8 × 0.6 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Scheelite extremely fluorescent long & short UV

Cassiterite

RJ6G6: The locality is really unusual for crystallized Cassiterite. Crystal shows well-shaped faces of the pyramid and, less defined, the faces of the prism. The base, very rough, is a contact.
Cerro Cobatillas, Cardeña, Córdoba  Spain

Specimen size: 1.5 × 1.4 × 1.1 cm = 0.6” × 0.6” × 0.4”

With handwritten note from the Folch Collection

Cassiterite

RH26H0: One of the frequent rarities that Folch’s collection contained, in this case for its locality. The crystal is a floater, with very sharp faces and edges with a little coverage of Mica.
Cerro Cobatillas, Cardeña, Córdoba  Spain

Specimen size: 1.7 × 1.5 × 1.1 cm = 0.7” × 0.6” × 0.4”

With handwritten note from the Folch Collection

Bismuth

RX64H8: Excellent thumbnail, very representative for the locality. Free of alteration, it has no real crystals (as frequently happens on this species) but shows a parallel polysynthetic growth of the Bismuth that forms a kind of feather. The specimen has a small matrix of Quartz. It is from a mine that closed a long time ago.
Mina La Espuela de San Miguel, Villanueva de Córdoba, Córdoba  Spain

Specimen size: 1.6 × 1.6 × 2.2 cm = 0.6” × 0.6” × 0.9”

With handwritten note from the Folch Collection

Bismuth

RA76H9: A good sample, very representative of the specimens from the locality. It is free of alteration and although not having visible crystals (which is common for the species) it shows the polysynthetic parallel growth typical for Bismuth, and it has the form of a “feather”. It is from an old mine closed for a long time ago.
Villanueva de Córdoba, Córdoba  Spain

Specimen size: 4.5 × 4.2 × 1.8 cm = 1.8” × 1.7” × 0.7”

With handwritten note from the Folch Collection

Bismuth

RD36H8: Excellent sample, very representative for the locality. Free of alteration, it has no real crystals (as frequently happens on this species) but shows a parallel polysynthetic growth of the Bismuth. It is from a mine that closed a long time ago.
Mina La Espuela de San Miguel, Villanueva de Córdoba, Córdoba  Spain

Specimen size: 4.8 × 3 × 2.4 cm = 1.9” × 1.2” × 0.9”

With handwritten note from the Folch Collection

Bismuth on Quartz

RF97K9: Polysynthetic and laminar growths, with a good luster, on a Quartz matrix with small grains of Bismuth disseminated throughout the matrix.
Mina La Espuela de San Miguel, Villanueva de Córdoba, Córdoba  Spain ((01/1963))

Specimen size: 5.4 × 3.4 × 2.8 cm = 2.1” × 1.3” × 1.1”

With handwritten note from the Folch Collection

Bismuth with Quartz

RX86R0: Small sharp crystals of native Bismuth, very bright and partially coated by well defined crystals of Quartz. With the Bismuth there are elongated brassy, not well defined, Bismuthinite crystals.
Mina La Espuela de San Miguel, Villanueva de Córdoba, Córdoba  Spain (09/1960)

Specimen size: 6.3 × 4.7 × 5.2 cm = 2.5” × 1.9” × 2.0”

With handwritten note from the Folch Collection

Bismuth with Calcite

RB13R0: Granular growths and small sharp crystals of Bismuth that are very bright and partially coated by rhombohedral Calcite crystals, uncommon for the locality, with very well defined faces and edges and, occasionally, skeletal growths.
Mina La Espuela de San Miguel, Villanueva de Córdoba, Córdoba  Spain

Specimen size: 7.9 × 5 × 3.7 cm = 3.1” × 2.0” × 1.5”

With handwritten note from the Folch Collection

Bismuth with Quartz

RE17R6: Growths of small crystals oriented in a socalled "feather" formation. The crystals are very bright and on a matrix with crystallized Quartz.
Mina La Espuela de San Miguel, Villanueva de Córdoba, Córdoba  Spain

Specimen size: 12.3 × 6.9 × 3.1 cm = 4.8” × 2.7” × 1.2”

With handwritten note from the Folch Collection

Bismuth

RA26G8: An historical sample, with a Folch’s autograph note, exactly detailing the point of the mine where it was mined, the gallery and the level and also the month and the year (1959). The sample is a close group of bright deformed and grained crystals, which are sharper in a zone rich on Quartz.
Mina Dolores, Nivel 60, Galería Sur, Pozoblanco, Córdoba  Spain (1959)

Specimen size: 4.7 × 3.4 × 3.7 cm = 1.9” × 1.3” × 1.5”

With handwritten note from the Folch Collection

Sphalerite

RA11P1: Group of very well defined crystals that came from a small well-documented Pyrite mine not known for well-crystallized samples of Sphalerite.
The citation A. d'Aboin on the label seems to refer to an engineer of the mine.
Mina San Miguel, Almonaster la Real, Huelva  Spain

Specimen size: 4.7 × 3.3 × 2 cm = 1.9” × 1.3” × 0.8”

Main crystal size: 1.2 × 1 cm = 0.5” × 0.4”

With handwritten note from the Folch Collection

Blue Topaz

RE6H7: A clear crystal with an excellent color. It has very neat faces and some have have striations and other growth forms. Classic Spanish locality (but not very well known) that produced few samples of such quality.
Mina San Nicolás, Valle de la Serena, Badajoz  Spain (±1976)

Specimen size: 1.7 × 1.5 × 1.7 cm = 0.7” × 0.6” × 0.7”

With handwritten note from the Folch Collection

Blue Topaz

RF16L9: Topaz crystal with good color and transparence from a Spanish locality that has became a classic. Well defined faces and edges, with thin vertical striations.
The piece is accompanied by a handwritten label from the Folch collection that we will send to the buyer.
Mina San Nicolás, Valle de la Serena, Badajoz  Spain (±1976)

Specimen size: 2.1 × 2 × 1.5 cm = 0.8” × 0.8” × 0.6”

With handwritten note from the Folch Collection

Blue Topaz

RB76H7: Clear crystal with an excellent color. It has very neat faces and well defined terminations with some different growth forms. Classic Spanish locality (but not very well known) that produced few samples of such quality.
Mina San Nicolás, Valle de la Serena, Badajoz  Spain (±1976)

Specimen size: 2.4 × 1.7 × 2.1 cm = 0.9” × 0.7” × 0.8”

With handwritten note from the Folch Collection

Blue Topaz

RC12M5: Very well defined crystal with dissolution forms and fibrous white undetermined inclusions. We specially note the locality, the only Spanish locality for gem topaz in notable quantity.
Mina San Nicolás, Valle de la Serena, Badajoz  Spain (±1976)

Specimen size: 2.5 × 2.3 × 1.5 cm = 1.0” × 0.9” × 0.6”

With handwritten note from the Folch Collection

Blue Topaz

RZ66H7: Clear crystal with an excellent color. It has very neat faces and well defined terminations with some different growth forms. Classic Spanish locality (but not very well known) that produced few samples of such quality.
Mina San Nicolás, Valle de la Serena, Badajoz  Spain (±1976)

Specimen size: 2.5 × 2.4 × 2.5 cm = 1.0” × 0.9” × 1.0”

With handwritten note from the Folch Collection

Fluorapatite

RM64L9: Thick tabular Fluorapatite crystal showing with excellent definition the unusual, for the Panasqueira Mine, pyramid faces. With very marked concentric color zoning. There is a chip at the upper right corner.
The piece is accompanied by a handwritten label from the Folch collection.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1972)

Specimen size: 2.9 × 2 × 1.4 cm = 1.1” × 0.8” × 0.6”

With handwritten note from the Folch Collection

Intense zoned fluorescence long & short UV

Fluorapatite with Arsenopyrite and Muscovite

RB76K9: Thick tabular Fluorapatite crystal, with excellent transparency, brilliance and color, with evident geometric zoning. On a Muscovite matrix with small Arsenopyrite crystals.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1972)

Specimen size: 4.2 × 3.2 × 2.0 cm = 1.7” × 1.3” × 0.8”

Main crystal size: 2.4 × 2.4 cm = 0.9” × 0.9”

With handwritten note from the Folch Collection

Fluorescent long & short UV

Doubly terminated Fluorapatite

RM27F9: Maybe the plate form of this crystal is not common, but it is really a doubly-terminated crystal of an excellent color and size. The sample was purchased by Folch in March 1969 from a miner in Panasqueira.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (1969)

Specimen size: 4.2 × 3.2 × 1.7 cm = 1.7” × 1.3” × 0.7”

With handwritten note & record from the Folch Collection

Intense Fluorescence long & short UV

Fluorapatite with Muscovite

TF46J3: Notable and esthetic group of tabular crystals, doubly terminated, transparent, bright and with zonation of color. They are on a Muscovite matrix with small crystals of Siderite.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1979)

Specimen size: 4.5 × 2.7 × 1.8 cm = 1.8” × 1.1” × 0.7”

Main crystal size: 1.8 × 1.5 cm = 0.7” × 0.6”

With handwritten note from the Folch Collection

Intense zoned fluorescence long & short UV

Fluorapatite with Calcite and Muscovite

RT6G8: Group short prismatic crystals, sharp and undamaged, on a matrix rich with Muscovite and small crystals of Calcite.
Minas da Panasqueira, Beira Baixa  Portugal

Specimen size: 7.3 × 6.5 × 4.3 cm = 2.9” × 2.6” × 1.7”

Main crystal size: 1.7 × 1.2 cm = 0.7” × 0.5”

With handwritten note from the Folch Collection

Fluorapatite fluorescent long & short UV

Fluorapatite with Ferberite and Muscovite

Front
Side

TV26J3: Group of very well defined short prismatic crystals, most of them doubly terminated, with a sharp crystal of Ferberite on a side of the specimen.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (10/1965)

Specimen size: 5.5 × 3.6 × 2.6 cm = 2.2” × 1.4” × 1.0”

Main crystal size: 2.2 × 2.2 cm = 0.9” × 0.9”

With handwritten note from the Folch Collection

Intense zoned fluorescence long & short UV

Fluorapatite with Muscovite, Pyrite and Siderite

RQ16G2: Short tabular crystals, doubly terminated, well developed and partially covered by Muscovite. This floater sample was purchased by Folch, in person, from a miner in Barroca Grande, in the year 1965.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (1965)

Specimen size: 3.9 × 2.2 × 2 cm = 1.5” × 0.9” × 0.8”

Main crystal size: 2.1 × 1.7 cm = 0.8” × 0.7”

With handwritten note & record from the Folch Collection

Extremely fluorescent long & short UV

Fluorapatite with Calcite

Front

Rear
Top

RE67G0: The crystal is floating, complete and rich in pyramidal forms, rarely seen in Panasqueira specimens. In the tip there is a zone of clearer green, almost white. The specimen, in the back, is partially recovered by Calcite.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (1967)

Specimen size: 6.9 × 4.1 × 2.5 cm = 2.7” × 1.6” × 1.0”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Ferberite with Muscovite, Siderite and Quartz

RM67H3: Excellent crystals, thicker than usual for Panasqueira and with very sharp and bright faces and edges. The faces are partially covered by spheroidal groups of Muscovite and small lenticular crystals of Siderite.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal

Specimen size: 5.5 × 3.5 × 2 cm = 2.2” × 1.4” × 0.8”

With handwritten note from the Folch Collection

Front
Side

Ferberite with Muscovite and Siderite

Front

Side

RZ86I8: Short prismatic crystal, doubly terminated and with parallel growths. On the back it is partially covered by small crystals of Siderite and Muscovite.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1980)

Specimen size: 5.5 × 3.7 × 2.5 cm = 2.2” × 1.5” × 1.0”

With handwritten note from the Folch Collection

Arsenopyrite with Siderite and Chalcopyrite

RG76G6: A nice group of doubly-terminated crystals of Arsenopyrite, with typical saw tooth edges and very bright. They contrast with lenticular crystals of Siderite and a little covering of Chalcopyrite.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal

Specimen size: 7.3 × 5.7 × 3.8 cm = 2.9” × 2.2” × 1.5”

Main crystal size: 1.5 × 1.4 cm = 0.6” × 0.6”

With handwritten note from the Folch Collection

Siderite with Quartz

RD60M0: Lenticular Siderite crystals with a marked color zoning darker in the center and light-colored towards the edges. On a Quartz matrix.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal

Specimen size: 4.9 × 4.2 × 2.4 cm = 1.9” × 1.7” × 0.9”

Main crystal size: 0.8 × 0.4 cm = 0.3” × 0.2”

With handwritten note & record from the Folch Collection

Sphalerite with Chalcopyrite, Siderite, Muscovite and Calcite

RP66P1: Bright Sphalerite crystal with deep striations and triangular echeloning on its faces. It is with massive Chalcopyrite, Siderite, Muscovite and Calcite.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1967)

Specimen size: 7.2 × 6.7 × 5.7 cm = 2.8” × 2.6” × 2.2”

Main crystal size: 4.7 × 3.4 cm = 1.9” × 1.3”

With handwritten note from the Folch Collection

Twinned Cassiterite

Front
Rear

TC26J3: A very interesting miniature both for the size of the crystal, considerable for Panasqueira, and because it is nearly transparent and has a very evident twin.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1978)

Specimen size: 2.6 × 2.6 × 2.8 cm = 1.0” × 1.0” × 1.1”

With handwritten note from the Folch Collection

Twinned Cassiterite

RC59I8: Crystal forms a cyclic, dipyramidal twin, very well defined. It has brown color and it is translucent and very bright.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal

Specimen size: 2 × 1.8 × 1.3 cm = 0.8” × 0.7” × 0.5”

With handwritten note from the Folch Collection

Cassiterite with Muscovite

RK27T5: Cyclic twinned crystals with sharp and very well defined faces and edges. They are translucent and extraordinarily bright and are on a matrix partially coated by Muscovite. A fine sample of one of the glorious epochs in Panasqueira.
Minas da Panasqueira, Beira Baixa  Portugal

Specimen size: 5.8 × 5 × 4.3 cm = 2.3” × 2.0” × 1.7”

Main crystal size: 1.1 × 1.1 cm = 0.4” × 0.4”

With handwritten note from the Folch Collection

Cassiterite with Quartz and Siderite

RK49K4: Great group of flat Cassiterite crystals. They are twinned, very bright and with small, very clear, crystals of Quartz on a matrix with lenticular crystals of Siderite. On the original label is written the year 1964.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1964)

Specimen size: 11.4 × 4.4 × 2.2 cm = 4.5” × 1.7” × 0.9”

Main crystal size: 0.7 × 0.5 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Arsenopyrite with Topaz and Siderite

RM46M9: Group of very well defined and bright crystals of Arsenopyrite with small crystals of Muscovite and white Siderite. On the bottom of the specimen there are a group of small crystals of Topaz. Although in the past some Topaz appeared in this mine, they are actually extremely rare.
Minas da Panasqueira, Level 2, Beira Baixa  Portugal (±1982)

Specimen size: 5.7 × 4.1 × 3.6 cm = 2.2” × 1.6” × 1.4”

Main crystal size: 2 × 1.5 cm = 0.8” × 0.6”

With handwritten note from the Folch Collection

Cassiterite

RQ6K9: Cassiterite crystal with sharp faces and edges. The twin is very marked. This specimen comes from a little known Portuguese locality.
Boticas, Chaves  Portugal

Specimen size: 3.4 × 3.2 × 2.5 cm = 1.3” × 1.3” × 1.0”

With handwritten note from the Folch Collection

Front
Top

Cassiterite with Quartz

RQ62H8: The locality is very little known for Cassiterite. The crystals, some of them doubly terminated, are prismatic, twinned and in matrix. Their color is unusually clear and they are well-defined.
Mirandela, Bragança, Alto Douro  Portugal (±1980)

Specimen size: 3.4 × 2.6 × 1.4 cm = 1.3” × 1.0” × 0.6”

Main crystal size: 1.2 × 0.9 cm = 0.5” × 0.4”

With handwritten note from the Folch Collection

EUROPE (EXCL. SPAIN AND PORTUGAL)

Austria

Epidote

RQ56G2: The sample comes from probably the most classic locality for Epidote. Crystals, prismatic and very thin, are grouped in a very disordered way but very esthetically. The piece is a floater.
Knappenwand, Untersulzbachtal, Salzburg  Austria

Specimen size: 7.2 × 3 × 2.6 cm = 2.8” × 1.2” × 1.0”

Main crystal size: 2.3 × 0.5 cm = 0.9” × 0.2”

With handwritten note from the Folch Collection

Strontianite with Calcite

Front

Top

RP67J1: Magnificent group of prismatic crystals of excellent size, definition of faces and edges, color and luster. They have marked inner phantom growths and they are on a base of small crystals of Calcite.
The specimen is with a label from Filer’s, Redlands, California, that we will send to the buyer.
Oberdorf an der Laming, Bruck an der Mur, Styria  Austria (±1964)

Specimen size: 4.7 × 4 × 3.5 cm = 1.9” × 1.6” × 1.4”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Calcite

RG14S7: Aggregate on matrix of scalenohedral crystals, translucent, bright, straw yellow and most of them doubly terminated. We especially note, due to its rarity, the locality.
Hochfeiler (Gran Pilastro), Ziller Valley, North Tyrol, Tyrol  Austria

Specimen size: 7.7 × 5.4 × 3.9 cm = 3.0” × 2.1” × 1.5”

Main crystal size: 1.8 × 0.8 cm = 0.7” × 0.3”

With handwritten note from the Folch Collection

Germany

Huréaulite

RT62J1: Very well defined, with excellent color, crystals from this locality are classic for the species. The crystals contrast on a dark matrix, they are quite individualized and some of them are doubly terminated.
We will send an old label of the sample, from Dr. H. Maucher, Munich, to the buyer.
Hagendorf, Waidhaus, Oberpfälzer Wald, Bavaria  Germany

Specimen size: 4.2 × 3.6 × 2.6 cm = 1.7” × 1.4” × 1.0”

Main crystal size: 0.3 × 0.1 cm = 0.1” × 0.0”

With handwritten note & record from the Folch Collection

Huréaulite

RH6F9: Faces of crystals are specially well defined, much more than is common for this phosphate, and the size is also considerable. In the label it's shown as Wenzelite (the old name for this species) with the proper correction.
Hagendorf, Waidhaus, Oberpfälzer Wald, Bavaria  Germany (±1953)

Specimen size: 3.5 × 2 × 2 cm = 1.4” × 0.8” × 0.8”

Main crystal size: 0.6 × 0.3 cm = 0.2” × 0.1”

With handwritten note & record from the Folch Collection

Laueite

RD6F8: A good miniature of this rare phosphate. The needlelike crystals fill a pocket and have associated Strunzite. It was bought from H. Maucher on 7 September 1959.
Hagendorf, Waidhaus, Oberpfälzer Wald, Bavaria  Germany (±1959)

Specimen size: 2.3 × 1.4 × 1.2 cm = 0.9” × 0.6” × 0.5”

With handwritten note & record from the Folch Collection

Type locality

Strengite on Quartz

RF37F8: Good crystals and good color. The locality is also rare in European collections and only a few of them contain specimens from it. Folch bought it from Peter Indergand who was from Göschenen, Switzerland.
Kreuzberg, Pleystein, Oberpfälzer Wald, Bavaria  Germany (±1956)

Specimen size: 4.2 × 2.8 × 2.6 cm = 1.7” × 1.1” × 1.0”

With handwritten note & record from the Folch Collection

Pyromorphite

RP76R6: Globular crystals of creamy color, with Quartz and on matrix. This very old European classic had been analyzed to certify the species and we send a copy of the analysis to the buyer.
Bad Ems, Bad Ems District, Lahn valley, Rhineland-Palatinate  Germany

Specimen size: 8.7 × 5.7 × 2.6 cm = 3.4” × 2.2” × 1.0”

Main crystal size: 0.4 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Chalcopyrite with Dolomite

RG76J1: Very isolated crystals of very well defined faces and edges and extraordinarily bright, on a matrix of Dolomite. We specially note the locality because, actually, it is very difficult to obtain specimens of such quality from there.
Altenberg, Erzgebirge, Saxony  Germany

Specimen size: 6.7 × 4.1 × 3.2 cm = 2.6” × 1.6” × 1.3”

Main crystal size: 0.6 × 0.5 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Pyrargyrite

RJ36H0: An excellent classic in “thumbnail” version. Crystals have very well developed and defined faces and edges.
Freiberg District, Erzgebirge, Saxony  Germany

Specimen size: 1.2 × 1.1 × 0.8 cm = 0.5” × 0.4” × 0.3”

Main crystal size: 0.5 × 0.2 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Pyrargyrite with Siderite

RQ99F9: The crystals are excellent, with prism faces less long than is usual for the species. It has a perfect hexagonal profile, with top faces totally flat and very esthetically positioned on its Siderite matrix. The specimen is with a very old label written with an old pen which is the base for autographed notes from Sr. Folch.
Annaberg, Erzgebirge, Saxony  Germany

Specimen size: 4.3 × 3.9 × 2.5 cm = 1.7” × 1.5” × 1.0”

Main crystal size: 1.4 × 1.1 cm = 0.6” × 0.4”

With handwritten note & record from the Folch Collection

Pyrargyrite with Calcite

Front

Detail seen from above

RH99F9: A beautiful group of prismatic crystals on the typical Calcite matrix from St. Andreasberg. in spite of its antiquity (it was purchased by Folch in 1955 but surely is much older) it is perfectly preserved and the crystal surface has reddish reflections not always present in the species.
St. Andreasberg, St. Andreasberg District, Harz Mountains, Niedersachsen  Germany

Specimen size: 4.7 × 4.7 × 2.7 cm = 1.9” × 1.9” × 1.1”

Main crystal size: 0.7 × 0.5 cm = 0.3” × 0.2”

With handwritten note & record from the Folch Collection

Greece

Rhodochrosite

RA76M0: Complex aggregate with an excellent color, very intense and bright. On matrix with Sphalerite.
This specimen is accompanied by the Siber+Siber label, from Zurich (Switzerland).

Madem Laccos Mine, Cassandra, Chalkidiki, Macedonia  Greece (±1973)

Specimen size: 5.7 × 5.1 × 2.1 cm = 2.2” × 2.0” × 0.8”

With handwritten note from the Folch Collection

Rhodochrosite

RD87G2: An attractive group from a very uncommon locality. The Rhodochrosite forms columnar growths of a splendid pink color and silky luster.
Cassandra Mines, Chalkidiki  Greece

Specimen size: 7 × 6 × 1.8 cm = 2.8” × 2.4” × 0.7”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Rhodochrosite

RC46G2: An attractive group from a very uncommon locality. The Rhodochrosite form columnar growths of a splendid pink color and silky luster.
Cassandra Mines, Chalkidiki  Greece

Specimen size: 9.2 × 6.5 × 4 cm = 3.6” × 2.6” × 1.6”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Italy

Andradite (Demantoid)

RJ16K4: On the sample coexist rounded crystals and very well defined ones on matrix. The color is good, classic for the locality. In some areas of the specimen there is fibrous Actinolite.
Franscia Cave, Lanzada, Val Malenco  Italy (±1926)

Specimen size: 11.7 × 6.2 × 3 cm = 4.6” × 2.4” × 1.2”

Main crystal size: 0.3 × 0.3 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Vesuvianite

RF64M5: The sample, from the type locality, shows a group of crystals on matrix, one of them clearly dominant, of very well defined faces and edges, brown with green reflections and a nice luster.
The sample is with an old label in which are no indications about the former collection. The label will be sent to the buyer.
Vesuvio, Somma-Vesuvio, Napoli, Campania  Italy

Specimen size: 3.7 × 4.7 × 5.4 cm = 1.5” × 1.9” × 2.1”

Main crystal size: 2 × 1.8 cm = 0.8” × 0.7”

With handwritten note from the Folch Collection

Type locality

Hematite with Quartz

RF46M5: Aggregate of lenticular, very bright crystals, partially covered by small white crystals of Quartz. A classic.
Rio Marina, Isola d'Elba  Italy

Specimen size: 12.3 × 9.8 × 9.5 cm = 4.8” × 3.9” × 3.7”

Main crystal size: 2.4 × 1.8 cm = 0.9” × 0.7”

With handwritten note from the Folch Collection

Atacamite

RA17K8: Not well defined crystal group of Atacamite, but with impressive color and brilliance. Also impressive is the origin of this specimen: Elba Island. From this locality Atacamite has been described as a very uncommon mineral.
Isola d'Elba  Italy

Specimen size: 7 × 5.2 × 4.5 cm = 2.8” × 2.0” × 1.8”

With handwritten note from the Folch Collection

Covellite with Pyrite

RL78F8: A very attractive specimen, for both its perfect size, definition, and intense, metallic blue of the laminar crystals of Covellite, which contrast well with the small groups of Pyrite crystals. The locality is its second strong point: the classic mine of Calabona, Sardinia. It was bought in 1922.
Miniera di Calabona, Alghero, Sassari, Sardegna  Italy (±1920)

Specimen size: 5 × 4.3 × 4.2 cm = 2.0” × 1.7” × 1.7”

With handwritten note & record from the Folch Collection

Anglesite with Galena

RE86J5: Typical crystal from Monteponi. Prismatic, clear, transparent, bright and on Galena matrix. Monteponi is one of the classic localities for Anglesite and Phosgenite.
Sr. Folch bought the specimen in 1914 to the Comptoir Minéralogique et Géologique Suisse of Geneva.
Monteponi Mine, Iglesias, Iglesiente, Cagliari, Sardegna  Italy (±1914)

Specimen size: 6.5 × 5.2 × 5.3 cm = 2.6” × 2.0” × 2.1”

Main crystal size: 1.5 × 1 cm = 0.6” × 0.4”

With handwritten note & record from the Folch Collection

Front

Side

Phosgenite on Galena

Front
Side

RY71G0: A doubly-terminated crystal, nicely developed, clear and of an excellent color. Its esthetic position on the matrix enhances its observation and exposition. On the upper part there is a break but it is hardly visible because the same Phosgenite crystal hides it.
Folch purchased the specimen in Milan, in 1965.
Monteponi Mine, Iglesias, Iglesiente, Cagliari, Sardegna  Italy

Specimen size: 5.3 × 3.8 × 4.5 cm = 2.1” × 1.5” × 1.8”

Main crystal size: 2 × 2 cm = 0.8” × 0.8”

With handwritten note from the Folch Collection

Very fluorescent long & short UV

Noruega

Corundum with Oligoclase and Biotite

TH77J3: Tabular crystals with geometric striations of growth. Color is very intense, especially enhanced when the specimen is under a strong light. Crystals are in a Biotite matrix very rich of Oligoclase. We are very pleased because it has been possible for us to precisely certify the locality of origin, which is not always easy.
This specimen is noted as acquired in 1957 and it is with a label from Burminco (George Burnham) that we’ll send to the buyer.
Kleggassen, Froland, Arendal Norway (±1957)

Specimen size: 5.4 × 4.4 × 2.4 cm = 2.1” × 1.7” × 0.9”

Main crystal size: 1 × 1 cm = 0.4” × 0.4”

With handwritten note & record from the Folch Collection

Corundum and Oligoclase fluorescent long & short UV

Ferrohornblende

RJ13H8: The faces of the prism are very well defined and with fine vertical striations, while terminations are less clear because they coincide with contacts. We call attention to the locality, one of the most classic from Norway.
Kragerö, Telemark Norway

Specimen size: 4.2 × 2 × 1.1 cm = 1.7” × 0.8” × 0.4”

With handwritten note & record from the Folch Collection

Rumania

Pyrrhotite

RM36F8: A curious growth form where the crystal’s lateral growth patterns have become so deep that they look like laminar crystals. For all the passage of time they still have excellent color and brilliance. It was bought in 1927 from W. Maucher of Munich.
Herja Mine, Herja, Maramures Rumania (±1927)

Specimen size: 3.6 × 2.8 × 2.2 cm = 1.4” × 1.1” × 0.9”

With handwritten note & record from the Folch Collection

Herja -> former Kisbanya

Sylvanite with Quartz

TG97J1: A specimen with pedigree, excellent and classic at the same time, with very well defined crystalline formations as usual for the species.
The specimen is with an old label from the Sir Arthur Russell collection (num. 32) in which is stated, as the previous source, the collection of Colonel H.W. Lake. With the specimen, we will send the label to the buyer.
Baia de Aries (Offenbánya), Apuseni mountains, Alba County, Transylvania Rumania

Specimen size: 5.9 × 4.4 × 2.8 cm = 2.3” × 1.7” × 1.1”

With handwritten note from the Folch Collection

Slovak Republic

Devilline

FQ76J7: Group of laminar crystals of extraordinarily deep bluish-green color, on matrix. The specimen, that was acquired in 1956 is with a label from Peter Indergant (numb. 1817) in which the species appears as Herrengrundite, a name actually now obsolete and that refers to its previous name, from Herregrund, its locality of origin.
Spania Dolina (Herrengrund), Banská Bystrica Slovak Republic (±1956)

Specimen size: 4.1 × 3.4 × 2.7 cm = 1.6” × 1.3” × 1.1”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Sweden

Berzeliite with Hausmannite

RT63F8: A very rare arsenate. It has surfaces with exfoliation that have an intense color. On the Quartz matrix there are also grains of Hausmanite. The printed label is from Dr. F. Krantz (Bonn)
Langban, Filipstad, Värmland Sweden (±1960)

Specimen size: 5 × 2.8 × 1.9 cm = 2.0” × 1.1” × 0.7”

With handwritten note & record from the Folch Collection

Type Locality

Calcite very fluorescent long & short UV

Gahnite

RK27F8: Two black, octahedral crystals on matrix. It is not common that one finds examples of this species with good crystal form, especially with such sharp profiles. It comes with a label from Deyrolle (Paris), where he bought it in 1933, which has Sr. Folch’s handwritten notes on it.
Fahlun, Kopparberg Sweden (±1930)

Specimen size: 5 × 2.5 × 1.8 cm = 2.0” × 1.0” × 0.7”

Main crystal size: 1.3 × 1.5 cm = 0.5” × 0.6”

With handwritten note & record from the Folch Collection

Type locality

Switzerland

Axinite-(Fe) with Albite and Chlorite

RC26K8: Group of crystals with very sharp faces and edges, very brilliant and transparent, partially covered by Chlorite on Albite matrix. This well-known locality is very poorly represented in mineral collections, including the very old ones.
Piz Vallatscha, Lukmanier Pass, Grisons  Switzerland (±1922)

Specimen size: 4.7 × 4.1 × 1.5 cm = 1.9” × 1.6” × 0.6”

Main crystal size: 0.8 × 0.5 cm = 0.3” × 0.2”

With record from the Folch Collection

Axinite-(Fe) with Albite

RK66H7: We specially note the locality, very rarely represented in collections. It is a flat crystal of well defined faces and edges, on a matrix of Albite. The Folch collection label shows it was purchased in Geneva in 1922.
Piz Vallatscha, Lukmanier Pass, Grisons  Switzerland (±1922)

Specimen size: 2.6 × 2.6 × 1.6 cm = 1.0” × 1.0” × 0.6”

Main crystal size: 2 × 1.2 cm = 0.8” × 0.5”

With handwritten note & record from the Folch Collection

Anatase and Quartz

TR64I8: Dipyramidal, very sharp and doubly terminated crystal with small crystals of Brookite and Quartz, on matrix. The sample is with a label from the Comptoir Minéralogique & Géologique Suisse, of Geneva.
Piz Aul, Vals, Vals Valley, Grisons  Switzerland

Specimen size: 5.3 × 3.9 × 3.7 cm = 2.1” × 1.5” × 1.5”

Main crystal size: 0.6 × 0.3 cm = 0.2” × 0.1”

With handwritten note & record from the Folch Collection

Anhydrite with Rutile on Dolomite

RB58F8: The color and transparency are both very good, as is the position of the doubly terminated crystals on the matrix. Nowadays it is extremely hard to get hold of this material as they came from the construction of the Simplon tunnel. This comes from an exchange with the Zurich museum and has a label from the collection of a technical college.
Simplon Tunnel, Wallis  Switzerland (±1950)

Specimen size: 3.2 × 2.8 × 2 cm = 1.3” × 1.1” × 0.8”

Main crystal size: 2.1 × 0.8 cm = 0.8” × 0.3”

With handwritten note & record from the Folch Collection

Front
Rear

Titanite with Chlorite

RB60P8: A crystal of Titanite of good size, very well defined, with curved faces and edges and completely chloritized, probably by Clinochlore. A classic.
Griesseren Valley, Maderanertal, Uri  Switzerland

Specimen size: 3.4 × 2.8 × 2.2 cm = 1.3” × 1.1” × 0.9”

With handwritten note from the Folch Collection

Epidote

RE58M2: Parallel growth of well defined and bright Epidote crystals, some of them doubly terminated, with an intense green color. The specimen was purchased by Folch from Joseph Levy, in Disla (Disentis, Switzerland) in 1949, as is indicated in the Folch collection card Nr. 4.812 which we will send to the buyer.
Gronda da Cavrein Valley, Vorderrhein Valley, Grisons  Switzerland (±1949)

Specimen size: 3 × 2.2 × 1.8 cm = 1.2” × 0.9” × 0.7”

Main crystal size: 2 × 0.9 cm = 0.8” × 0.4”

With handwritten note & record from the Folch Collection

Epidote with Byssolite

RH26G2: An esthetic specimen from a classic locality in which Epidote is uncommon. Crystals are prismatic, well terminated and some of them are transparent. They are in a matrix with a fibrous silicate, probably Actinolite, variety Byssolite. The specimen was purchased by Folch from Joseph Levy, in Disla (Disentis) in 1949.
Val Cavrein, Grisons  Switzerland (±1949)

Specimen size: 4.7 × 3.6 × 3 cm = 1.9” × 1.4” × 1.2”

Main crystal size: 4 × 1.6 cm = 1.6” × 0.6”

With handwritten note & record from the Folch Collection

Epidote with Diopside

RG58M2: Prismatic Epidote crystals with well defined faces and edges and perfect terminations with a deep color and good brilliance. On matrix.
Pollux Mountain, Zermatt, Matter Valley, Valais  Switzerland (08/1953)

Specimen size: 4.8 × 2.9 × 2.4 cm = 1.9” × 1.1” × 0.9”

Main crystal size: 0.8 × 0.6 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Vesuvianite

RK10M2: One of the classic localities for the species. A group of deep brown flattened crystals, with short prism faces and pyramid faces which are intersected by the predominant pinacoidal faces.
Rimpfischwange, Zermatt, Valais  Switzerland (09/1951)

Specimen size: 3.5 × 2.8 × 1.1 cm = 1.4” × 1.1” × 0.4”

Main crystal size: 0.6 × 0.5 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Diopside

RZ6F9: It seems to emerge from an old book of mineralogy, this classic group of prismatic crystals, some of them doubly-terminated, has a rich green color. It is on a green schist matrix.
Cherbadung, Binnthal  Switzerland

Specimen size: 4.2 × 3.3 × 2.5 cm = 1.7” × 1.3” × 1.0”

Main crystal size: 1.5 × 0.3 cm = 0.6” × 0.1”

With handwritten note & record from the Folch Collection

Hematite with Rutile and Adular

RJ11G8: Nice miniature. Tabular crystals of Hematite are very sharp and they have small red epitactic crystals of Rutile. Hematite contrasts strongly with Adularia matrix. On the record card there is a note as acquired by J. Hitz, in Rauris, in 1952.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1952)

Specimen size: 3.7 × 2 × 2.9 cm = 1.5” × 0.8” × 1.1”

Main crystal size: 1.1 × 0.7 cm = 0.4” × 0.3”

With handwritten note & record from the Folch Collection

Hematite with epitaxial Rutile

RC16G6: Group of laminar crystals with very sharp edges and very visible triangular growth forms. On the faces of the Hematite there are epitaxial crystals of Rutile of intense red color. The label reveals that it was purchased in Switzerland, from Allois Curschelos of Surrein, in 1952.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1952)

Specimen size: 3.1 × 2.9 × 0.4 cm = 1.2” × 1.1” × 0.2”

With handwritten note & record from the Folch Collection

Hematite with Rutile

Front

Rear

RQ46G0: The specimen is a classic for Switzerland. It is floating and the most evident features are the brightness, the smoothness and sharpness of faces and edges, the presence of growth lines, and the epitaxial growth of red crystals of Rutile.
The sample was acquired in a trade with the Geneva Museum in 1947.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1947)

Specimen size: 3.5 × 3 × 1.5 cm = 1.4” × 1.2” × 0.6”

With handwritten note & record from the Folch Collection

Quartz

RJ26G2: The crystal is perfectly transparent; its faces are sharply defined, with an "Alpine" quality, on a matrix with a fibrous silicate, probably Actinolite which penetrates into the Quartz as an inclusion.
Val Cavrein, Grisons  Switzerland (±1949)

Specimen size: 6.1 × 3 × 2.5 cm = 2.4” × 1.2” × 1.0”

With handwritten note & record from the Folch Collection

Doubly terminated Quartz

RL46L9: Group of doubly terminated Quartz crystals, one of them clearly dominant, with excellent transparency and good brilliance. The crystal that serves as a base seems broken but is undamaged, with curious face growths.
The piece is accompanied by a handwritten label from the Folch collection.
Voralp Valley, Uri  Switzerland

Specimen size: 7.1 × 4 × 2 cm = 2.8” × 1.6” × 0.8”

Main crystal size: 6.6 × 2.2 cm = 2.6” × 0.9”

With handwritten note from the Folch Collection

Doubly terminated Quartz with Hematite

RA17L3: Two crystals, one of them doubly terminated, totally clear, very bright, with Albite inclusions and Hematite and showing uncommon accessory rhombohedral oscillatory faces. From a classic Alpine area.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1954)

Specimen size: 5.6 × 3.9 × 3.7 cm = 2.2” × 1.5” × 1.5”

Main crystal size: 4.8 × 2.5 cm = 1.9” × 1.0”

With handwritten note from the Folch Collection

Front
Side

Doubly terminated and twinned Quartz

Front

Rear

RJ63I7: Twinned, doubly terminated crystal. The twin is very visible, an unusual thing for Quartz, because the suture crosses the front face of the prism and the opposite position of the accessory rhombohedron faces.
Wassen, Uri  Switzerland (±1980)

Specimen size: 5 × 2.9 × 2.9 cm = 2.0” × 1.1” × 1.1”

With handwritten note from the Folch Collection

Quartz

RQ13M2: This Quartz crystal stands out for the definition of its forms and its purity, transparency and incredible luster. A collector’s choice specimen.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1947)

Specimen size: 4.8 × 2.5 × 1.6 cm = 1.9” × 1.0” × 0.6”

With handwritten note from the Folch Collection

Smoky Quartz with Chlorite

Front
Side

RT86I2: Very well defined and superbly transparent prisms.
Maderanertal, Amsteg, Uri  Switzerland (±1981)

Specimen size: 7.8 × 4.3 × 2.5 cm = 3.1” × 1.7” × 1.0”

Main crystal size: 7.8 × 2.7 cm = 3.1” × 1.1”

With handwritten note from the Folch Collection

Doubly terminated smoky Quartz

RD13M2: Group of Quartz crystals, one of them dominant, doubly terminated and with very sharp faces and edges. Although its uniform smoky tones are not very deep, the transparency is excellent. In the Folch collection card one can read that this sample, collection Nr. 4.147, was obtained by exchange in 1950 with Herr Sulzbach from Zurich (Switzerland).
Sidelangetscher, Furka Pass area, Urseren, Uri  Switzerland (±1950)

Specimen size: 5.6 × 5 × 3.7 cm = 2.2” × 2.0” × 1.5”

Main crystal size: 5.5 × 3.3 cm = 2.2” × 1.3”

With handwritten note & record from the Folch Collection

Front
Rear

Quartz with Hematite

RQ27R6: Group of mostly doubly terminated crystals of Quartz. They are completely clear, very bright and are on matrix with small platy crystals of Hematite. An excellent Alpine classic.
Cavradi, Curnera, Tavetsch, Grisons  Switzerland (±1954)

Specimen size: 7.2 × 7 × 4.8 cm = 2.8” × 2.8” × 1.9”

Main crystal size: 4.9 × 1.8 cm = 1.9” × 0.7”

With handwritten note from the Folch Collection

Smoky Quartz

RC63M0: Parallel growth of right-handed and doubly terminated smoky Quartz crystals, one of them dominant, with an excellent transparency, luster and a deep color. With complex and multiple terminations.
Oberalp Pass area, Tavetsch, Vorderrhein Valley, Grisons  Switzerland

Specimen size: 5 × 3.7 × 2.8 cm = 2.0” × 1.5” × 1.1”

With handwritten note from the Folch Collection

Front
Rear

Smoky Quartz with Actinolite

RF11M3: Group of smoky Quartz crystals with well defined edges and very transparent and brilliant faces. Smoky color is very uniform and deep. On a matrix with fibrous Actinolite.
The piece is accompanied by a handwritten label with notes from Mr. Folch.
Val Giuf, Tavetsch, Grisons  Switzerland

Specimen size: 5.3 × 4 × 3.1 cm = 2.1” × 1.6” × 1.2”

Main crystal size: 2.2 × 1.2 cm = 0.9” × 0.5”

With handwritten note from the Folch Collection

Smoky Quartz with Chlorite and amphibole

RR66P1: Group of Quartz crystals of excellent brilliance, transparency and color, very deep. Some of the faces selectively have inclusions of Chlorite and, on the base, there also are fibrous aggregates of an indeterminate amphibole, probably Actinolite (Byssolite).
Val Giuf, Tavetsch, Grisons  Switzerland

Specimen size: 9.8 × 5.3 × 3.3 cm = 3.9” × 2.1” × 1.3”

Main crystal size: 3.4 × 1.1 cm = 1.3” × 0.4”

With handwritten note from the Folch Collection

Front
Side

Quartz

Front
Side

RA12S7: Group of very bright clear crystals. They are doubly terminated, with sharp polycrystalline growths and growth deformations at the base.
Oberalpstock Mountain, Strem Valley, Tavetsch, Vorderrhein Valley, Grisons  Switzerland (±1946)

Specimen size: 5.4 × 3.8 × 3 cm = 2.1” × 1.5” × 1.2”

Main crystal size: 4.2 × 2.4 cm = 1.7” × 0.9”

With handwritten note from the Folch Collection

Doubly terminated smoky Quartz with Clinochlore

RF8S7: Doubly terminated crystals with a scepter termination at one of its terminations, very well marked by an evident change of color, that changes to white.
Tavetsch, Vorderrhein Valley, Grisons  Switzerland

Specimen size: 5.2 × 2.3 × 2 cm = 2.0” × 0.9” × 0.8”

With handwritten note from the Folch Collection

Quartz with Epidote inclusions

RM12T5: Group of sharp, clear and colorless crystals that are very bright and have acicular inclusions of green Epidote at their base.
Göschener Alp, Göschenen Valley, Uri  Switzerland

Specimen size: 8 × 4.7 × 3.3 cm = 3.1” × 1.9” × 1.3”

Main crystal size: 5.3 × 2.6 cm = 2.1” × 1.0”

With handwritten note from the Folch Collection

Quartz with Chlorite inclusions

RB97P1: Group of Quartz crystals with very well defined phantom growths, underlined by the inner coatings of Chlorite. Some of the crystals are partially coated by a second generation of Quartz crystals forming rosettes and very clear and bright small crystals.
Viaplana, Sils, Thusis, Domleschg, Hinterrhein Valley, Grisons  Switzerland

Specimen size: 6.8 × 4.3 × 5.4 cm = 2.7” × 1.7” × 2.1”

Main crystal size: 4.6 × 1.4 cm = 1.8” × 0.6”

With handwritten note from the Folch Collection

Front
Top

Quartz with Albite

RV62M2: Very curious Quartz specimen with a morphology more similar to Topaz than Quartz. Partially covered by Albite crystals, implanted on an Orthoclase (Adularia) matrix.
Hospental, Urseren, Uri  Switzerland (±1952)

Specimen size: 5.7 × 4 × 3.1 cm = 2.2” × 1.6” × 1.2”

Main crystal size: 3.5 × 3.2 cm = 1.4” × 1.3”

With handwritten note from the Folch Collection

Fluorescence on the matrix (short and long UV)

Quartz with Hematite and Ankerite

RC63M5: Doubly terminated crystal of light smoky Quartz with one of its terminations simple and the opposite multiple. It is partially covered by Ankerite and small laminar crystals of Hematite.
Wassen, Uri  Switzerland

Specimen size: 6.2 × 4.1 × 2.3 cm = 2.4” × 1.6” × 0.9”

With handwritten note from the Folch Collection

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Quartz with Rutile

RQ14Q5: Very elongated crystal of Rutile, completely doubly terminated, with very well defined faces and edges and being almost completely included in a clear crystal of Quartz.
Oberalp Pass area, Tavetsch, Vorderrhein Valley, Grisons  Switzerland

Specimen size: 7.5 × 6 × 4.2 cm = 3.0” × 2.4” × 1.7”

Main crystal size: 5.2 × 1.7 cm = 2.0” × 0.7”

With handwritten note from the Folch Collection

Smoky Quartz Gwindel

RL96H9: Some groups formed by subparallel growths of prismatic crystals are referred to as gwindels. In this one the smoky color is not deep but the crystals are clear and bright. The locality is a classic for an Alpine gwindel.
Goscheneralp, Uri  Switzerland

Specimen size: 6.5 × 4.5 × 6.8 cm = 2.6” × 1.8” × 2.7”

With handwritten note from the Folch Collection

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Smoky Quartz Gwindel

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RV46H8: A classic Alpine gwindel, Swiss in this case. The color is deep smoky and it is enhanced by the extreme transparency and luster of the sample. It is free of damage because the lower side is a neat contact.
Val Giuf, Tavetsch, Grisons  Switzerland (±1980)

Specimen size: 3.9 × 3.9 × 1.5 cm = 1.5” × 1.5” × 0.6”

With handwritten note from the Folch Collection

Smoky Quartz Gwindel with Chlorite

RC47H7: Parallel aggregate with a slightly twisting (gwindel) The faces of the prism are neat and bright; meanwhile the rhombohedron is rough and matte due to Chlorite inclusions. The specimen entered the Folch collection through an exchange in 1947.
Drum Tobel, Sedrun, Tavetsch, Grisons  Switzerland (±1940)

Specimen size: 5.3 × 5.2 × 2.7 cm = 2.1” × 2.0” × 1.1”

With handwritten note & record from the Folch Collection

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Gwindel Smoky Quartz

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RK37F8: A doubly terminated, slightly curved, smoky, very transparent gwindel. The special thing is that, apart from its perfection, it is on a matrix on doubly terminated, but not gwindel, Quartz. This floater was bought from Kaspar Nelly (Switzerland) in March 1948.
Etzlithal, Uri  Switzerland (±1948)

Specimen size: 4.8 × 4.4 × 3 cm = 1.9” × 1.7” × 1.2”

Main crystal size: 3.8 × 2.9 cm = 1.5” × 1.1”

With handwritten note & record from the Folch Collection

Gwindel Quartz with Chlorite inclusions

RA50R0: Doubly terminated, partially chloritized, crystal with parallel polycrystalline terminations. The twisting (gwindel) of the crystal is especially evident on one of the main edges.
Binntal, Wallis  Switzerland (±1948)

Specimen size: 12.7 × 6.2 × 3.3 cm = 5.0” × 2.4” × 1.3”

With handwritten note & record from the Folch Collection

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Smoky Quartz "Tessiner habitus"

RM36H7: Quartz crystal with Tessiner habit, with the typical very acute form of the faces of an uncommon rhombohedron, greatly elongated producing the piling up of the central zone of the prism which becomes progressively thicker toward the base.
Val Maggia, Canton Tessin  Switzerland (±1980)

Specimen size: 7.5 × 2.4 × 2.4 cm = 3.0” × 0.9” × 0.9”

With handwritten note from the Folch Collection

Quartz "Tessiner habitus"

RL26H7: Quartz crystal with Tessiner habit, with the typical very acute form of the faces of an uncommon rhombohedron, greatly elongated producing the piling up on the central zone of the prism which becomes progressively thicker toward the base.
Val Maggia, Canton Tessin  Switzerland (±1980)

Specimen size: 5.3 × 2.8 × 2 cm = 2.1” × 1.1” × 0.8”

With handwritten note from the Folch Collection

Quartz with Actinolite

RE86R0: Doubly terminated crystal that has one of its terminations single and the opposite polycrystalline. The sample shows curious naturally corroded areas on most of its faces. In addition, a small ball of Actinolite, outside and inside the Quartz. The locality is an European classic.
Bristenstock Mountain, Bristen, Reuss Valley, Uri  Switzerland

Specimen size: 8 × 4.3 × 3.8 cm = 3.1” × 1.7” × 1.5”

With handwritten note from the Folch Collection

Quartz

RG46R6: Very transparent and bright crystal with very well defined faces and edges, with abundant cavities and curious dissolution forms. Folch acquired it from the "Mineralienkabinnet" of Schweitzer Heimatwek in Zürich.
Rhône Glacier, Furka, Furka Pass area, Valais  Switzerland (±1961)

Specimen size: 8.7 × 3.2 × 3.7 cm = 3.4” × 1.3” × 1.5”

With handwritten note from the Folch Collection

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Quartz

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RK49H0: A curious formation, a parallel growth of numerous crystals giving as a result the appearance of a single crystal with dissolution forms on faces and edges while retaining the excellent luster and transparency. The specimen is a floater.
Rhône Glacier, Furka, Furka Pass area, Valais  Switzerland (±1961)

Specimen size: 11.2 × 4.2 × 4.2 cm = 4.4” × 1.7” × 1.7”

With handwritten note from the Folch Collection

Orthoclase (Adularia) with Chlorite

RD16K4: Manebach twin of two crystals with selective inclusions of Chlorite: some of the faces have the inclusions while others are completely free of them.
Binntal, Wallis  Switzerland (1949)

Specimen size: 2.7 × 2.4 × 2.4 cm = 1.1” × 0.9” × 0.9”

With handwritten note from the Folch Collection

Minor fluorescence short UV

United Kingdom

Datolite

RJ57Q5: Datolite with an excellent crystallization from a very unusual locality, classic for the mineralogy of the United Kingdom, but whose specimens are today practically impossible to find.
Isle of Skye, North West Highlands, Scotland  United Kingdom

Specimen size: 4.2 × 2.4 × 2.4 cm = 1.7” × 0.9” × 0.9”

Main crystal size: 1.2 × 0.7 cm = 0.5” × 0.3”

With handwritten note from the Folch Collection

Chalcocite with Bornite

RC12K9: Skeletal growths of Chalcocite, acompanied by parallel aggregates of small Bornite cubic crystals.
Carn Brea Mines, Pool, Illogan, Cornwall, England  United Kingdom

Specimen size: 2.4 × 2.0 × 1.4 cm = 0.9” × 0.8” × 0.6”

Main crystal size: 0.4 × 0.3 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Chalcocite with Bornite

RB63J5: Excellent classic miniature. Group of prismatic crystals of very well defined faces and edges.
Carn Brea Mines, Pool, Illogan, Cornwall, England  United Kingdom

Specimen size: 2.6 × 1.9 × 1.7 cm = 1.0” × 0.7” × 0.7”

Main crystal size: 0.6 × 0.3 cm = 0.2” × 0.1”

With record from the Folch Collection

Minor fluorescence short UV

Chalcocite with Bornite

RA86J5: Excellent classic miniature. Group of tabular pseudohexagonal crystals of very well defined faces and edges.
Carn Brea Mines, Pool, Illogan, Cornwall, England  United Kingdom

Specimen size: 3 × 2.6 × 1.7 cm = 1.2” × 1.0” × 0.7”

Main crystal size: 0.4 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Minor fluorescence short UV

Cassiterite

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RK36F9: The classic habit for crystals of Cassiterite from the Dolcoath mine. Very enlarged prisms with faces on the tips forming very acute pyramids. A specimen with pedigree because on its back side are both the numbers of the Folch and Sir Arthur Russell collections. The specimen is documented also with the labels from both collections.
Dolcoath Mine, Tuckingmill, Camborne, Cornwall, England  United Kingdom

Specimen size: 3.3 × 2.6 × 2.3 cm = 1.3” × 1.0” × 0.9”

Main crystal size: 0.6 × 0.2 cm = 0.2” × 0.1”

With handwritten note & record from the Folch Collection

Cassiterite with Zinkenite

RJ47F8: A group of Cassiterite twins, very typical of Cornwall and on matrix. Needle crystals of Zinkenite accompany the Cassiterite. Although the mine that it is from is not given, it is the type of specimen that is hard to find.
Cornwall, England  United Kingdom (±1926)

Specimen size: 6 × 4.8 × 2.7 cm = 2.4” × 1.9” × 1.1”

Main crystal size: 1.2 × 1.2 cm = 0.5” × 0.5”

With handwritten note from the Folch Collection

Chalcopyrite with Quartz

RM47F8: An excellent and classic example from the Tincroft Mine. A group of well defined crystals on a perfectly sized matrix. It was bought from Sir Arthur Russell in 1926.
Tincroft Mine, Pool, Illogan, Redruth, Cornwall, England  United Kingdom (±1926)

Specimen size: 3.7 × 3.4 × 3.1 cm = 1.5” × 1.3” × 1.2”

Main crystal size: 0.9 × 0.8 cm = 0.4” × 0.3”

With handwritten note & record from the Folch Collection

Pyromorphite

RQ16K0: Prismatic crystals on matrix. The prisms are not well defined due to the fact that they are formed by aggregates of acicular crystals that give a satin luster to them. Color is good for the locality.
Cornwall, England  United Kingdom

Specimen size: 3.6 × 3.3 × 3.2 cm = 1.4” × 1.3” × 1.3”

Main crystal size: 0.8 × 0.5 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Minor fluorescence with long & short UV

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Pyromorphite

RF14R0: Group of small crystals with rounded faces and edges, most of them almost spherical. They are light green and on a first generation of very minute brownish crystals of the same Pyromorphite, all on matrix. Often with such old samples we haven't exact information about the precise locality.
Cornwall, England  United Kingdom

Specimen size: 7.4 × 4.6 × 3.4 cm = 2.9” × 1.8” × 1.3”

Main crystal size: 0.2 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Fluorescent long & short UV

Pyromorphite

RB96F9: A group of prismatic crystals of an excellent color and a very vivid brightness.
The specimen is enriched by an old label from the Sir Arthur Russell collection (number 64)
Wheal Alfred, Phillack, Cornwall, England  United Kingdom (±1824)

Specimen size: 2.5 × 2 × 1.7 cm = 1.0” × 0.8” × 0.7”

Main crystal size: 0.7 × 0.3 cm = 0.3” × 0.1”

With handwritten note from the Folch Collection

Fluorescent long & short UV

Pyromorphite on Quartz

RK26F9: Collecting is also History and this specimen, with little prismatic crystals on Quartz, is History. Originally labeled as Campilite, it was purchased by Sr. Folch in 1940.
Wheal Alfred, Phillack, Cornwall, England  United Kingdom

Specimen size: 4.8 × 4 × 2 cm = 1.9” × 1.6” × 0.8”

Main crystal size: 0.3 × 0.1 cm = 0.1” × 0.0”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Cuprite

RV36F8: A miniature classic from the Wheal Phoenix Mine. The crystals are brilliant, have good color, and have perfect growth of the octahedral form, and also the cubic form in some cases. The handwritten label has ‘Russell’ written on it, so it must have come from Sir Arthur Russell, who Folch knew.
Wheal Phoenix, Linkinhorne, Liskeard, Cornwall, England  United Kingdom (±1948)

Specimen size: 3.8 × 1.9 × 1.9 cm = 1.5” × 0.7” × 0.7”

Main crystal size: 0.2 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Cuprite with Copper

RC86H0: Another classic, with the typical appearance of the Cuprite samples from Liskeard. Crystals are octahedrons and they show two different forms, isolated on most of the piece’s surface and spherically grouped on the upper left zone. There is also native Copper on the back side of the piece.
South Caradon, Liskeard, Cornwall, England  United Kingdom (±1926)

Specimen size: 6.5 × 4.2 × 3 cm = 2.6” × 1.7” × 1.2”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Chalcosiderite with Quartz

RE27P1: Aggregates of small very well defined crystals, very bright and of deep color filling vugs in a Quartz matrix.
The sample is from the collection of Sir Arthur Russell and previously from the collection of J.J. Couzens.
Wheal Phoenix, Linkinhorne, Liskeard, Cornwall  United Kingdom

Specimen size: 7.9 × 6.1 × 2 cm = 3.1” × 2.4” × 0.8”

Main crystal size: 0.2 × 0.1 cm = 0.1” × 0.0”

With handwritten note from the Folch Collection

Chalcosiderite

RA87F8: A specimen that is especially rich in brilliant, well colored micro-crystals of this rare species. From the Parisian dealer Deyrolle.
Cornwall, England  United Kingdom

Specimen size: 6.7 × 3.5 × 4.5 cm = 2.6” × 1.4” × 1.8”

With handwritten note from the Folch Collection

Olivenite

RT17F9: Acicular crystals reach a considerable length and form attractive aggregates on matrix. An interesting note to add is that the species was first described on samples from Cornwall.
Cornwall, England  United Kingdom

Specimen size: 4.9 × 3 × 2 cm = 1.9” × 1.2” × 0.8”

With handwritten note from the Folch Collection

Olivenite

RQ80F9: Fine specimen of this rare arsenate. Acicular crystals are grouped in very definite aggregates, with the classic olive-green color for which the mineral is named, on a Quartz matrix. Cornwall is the type locality for the species.
Cornwall, England  United Kingdom

Specimen size: 6.2 × 4.5 × 3.3 cm = 2.4” × 1.8” × 1.3”

With handwritten note from the Folch Collection

Olivenite with Malachite

FY48J6: Radial groups of acicular crystals with the olive color characteristic of the species. The sample also has concretions of Malachite and it is on matrix.
The sample has all the virtues we love on best Folch’s specimens. Presence, classic taste and pedigree, enhanced by the labels of Sir Arthur Russell collection and, originally, from Lady Elizabeth Anne Coxe Hippisley collection.
Wheal Gorland Mine, Gwennap, Saint Day, Redruth, Cornwall, England  United Kingdom

Specimen size: 8.2 × 4.5 × 4.6 cm = 3.2” × 1.8” × 1.8”

Main crystal size: 0.4 × 0.1 cm = 0.2” × 0.0”

With handwritten note & record from the Folch Collection

Liroconite

RE92G2: Type locality. Crystals are very numerous, most of them well developed and some with deformations and contacts (but no damage). They have two very different colors, the typical blue and the greenish, much less common.
Wheal Gorland Mine, Gwennap, Saint Day, Redruth, Cornwall, England  United Kingdom

Specimen size: 8.5 × 7.8 × 6.8 cm = 3.3” × 3.1” × 2.7”

Main crystal size: 0.5 × 0.2 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Twinned Bournonite with Quartz

RY30F8: Extraordinary specimen. The cogwheel twin, along with some other smaller ones, is perfectly placed on the matrix and has maintained its brilliance over the years. The locality is also wonderful: Herodsfoot Mine. To add even more to its glory it was bought from Sir Arthur Russell in 1926.
Herodsfoot Mine, Lanreath, Liskeard District, Cornwall, England  United Kingdom (±1926)

Specimen size: 5.2 × 2.7 × 3.3 cm = 2.0” × 1.1” × 1.3”

Main crystal size: 2.5 × 1.7 cm = 1.0” × 0.7”

With handwritten note & record from the Folch Collection

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Topaz

RJ10M2: Miass is one of the best known classic localities for the species, but contrary to the usual blue color for Topaz specimens from there, this crystal shows a lively yellow color. The transparency, brilliance and definition of its crystalline forms are excellent.
Miass, Ilmen Mountains, Chelyabinsk Oblast, Urals Russia

Specimen size: 1.3 × 1.1 × 0.9 cm = 0.5” × 0.4” × 0.4”

With handwritten note from the Folch Collection

Minor fluorescence short UV

Azurite

RH11I8: The crystal is prismatic, doubly terminated and with very well defined faces and edges. The termination below, even being less marked faces, is clear and defined.
Kerrouchen, Khénifra  Morocco (±1978)

Specimen size: 3.7 × 2.2 × 1.5 cm = 1.5” × 0.9” × 0.6”

With handwritten note & record from the Folch Collection

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Skutterudite with Calcite

RF60Q5: Cube-octahedral crystal with very well defined faces and edges, on matrix and with Calcite. A Moroccan classic.
Bou Azzer area, Tazenakht, Ouarzazate  Morocco

Specimen size: 4.2 × 4 × 2.8 cm = 1.7” × 1.6” × 1.1”

Main crystal size: 2.2 × 2.2 cm = 0.9” × 0.9”

With handwritten note from the Folch Collection

Skutterudite

RD46G2: A well developed crystal on matrix. The sample was purchased by Folch from Victor Yount in 1974 when Yount began the commerce of minerals, precisely in Spain.
Bou Azzer area, Tazenakht, Ouarzazate  Morocco (±1971)

Specimen size: 4 × 3.8 × 2.5 cm = 1.6” × 1.5” × 1.0”

Main crystal size: 2.5 × 2 cm = 1.0” × 0.8”

With handwritten note & record from the Folch Collection

Calcite fluorescent long & short UV

Erythrite with Roselite and Skutterudite

RF86H7: Vug of Erythrite from the finds in the second half of the seventies. Some of the crystals are erect and aerial and they are bright, transparent and have good color.
Bou Azzer area, Tazenakht, Ouarzazate  Morocco (±1967)

Specimen size: 6.7 × 5.1 × 3.8 cm = 2.6” × 2.0” × 1.5”

Main crystal size: 0.7 × 0.5 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Roselite with Calcite

RX60N4: Very well defined and isolated crystals of good color and transparency, with Calcite and on matrix.
Arhbar Mine, Bou Azzer area, Tazenakht, Ouarzazate  Morocco (±1979)

Specimen size: 3.4 × 2.4 × 1.7 cm = 1.3” × 0.9” × 0.7”

Main crystal size: 0.4 × 0.2 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Roselite with Calcite

RE14I7: Groups of crystals that have excellent color and luster. They are with small crystals of Calcite and a crystal of Quartz. On the original label a note says it was acquired November 8, 1969, by H. Sleiffer, from the Netherlands at the Zurich show.
Arhbar Mine, Bou Azzer area, Tazenakht, Ouarzazate  Morocco (±1969)

Specimen size: 5.4 × 3.8 × 2.4 cm = 2.1” × 1.5” × 0.9”

Main crystal size: 0.2 × 0.2 cm = 0.1” × 0.1”

With handwritten note & record from the Folch Collection

Calcite fluorescent long & short UV

Plancheite with Chrysocolla

RN59M2: A representative specimen for classic Plancheite specimens, a little bit different than the actual samples we usually see in the market. This specimen is in spherical forms constituted by radiated acicular growths with a deep blue color, partially covered by a Chrysocolla layer. A really nice miniature from past times.
Kambove, Central area, Shaba  Congo D.R. (±1958)

Specimen size: 2 × 1.5 × 1.4 cm = 0.8” × 0.6” × 0.6”

With handwritten note from the Folch Collection

Plancheite with Malachite

RM63M9: Classic sample in which the laminar growths of silky luster and greenish blue color surround a group of Malachite.
Kambove, Central area, Shaba  Congo D.R. (±1958)

Specimen size: 3.5 × 2.6 × 2.2 cm = 1.4” × 1.0” × 0.9”

With handwritten note & record from the Folch Collection

Chalcocite

RF62I8: An especially interesting miniature. The sharp crystals, with very well-defined faces and edges, form a very aerial parallel growth.
Katanga  Congo D.R.

Specimen size: 1.6 × 0.9 × 1 cm = 0.6” × 0.4” × 0.4”

With handwritten note from the Folch Collection

Chalcocite

RE62I8: An especially interesting miniature. The sharp crystals, with very well-defined faces and edges, form a very aerial parallel growth.
Katanga  Congo D.R.

Specimen size: 1.3 × 1 × 0.7 cm = 0.5” × 0.4” × 0.3”

With handwritten note from the Folch Collection

Hopeite

RG47F8: The crystals have formed as two generations. In the first it has created white prisms and in the second the prisms are exceptional for their growth, brilliance and transparency. A gift from a German engineer (he does not give his name) who collected it in the mine in 1921.
Broken Hill, Kabwe  Zambia (1921)

Specimen size: 2.9 × 2 × 1.9 cm = 1.1” × 0.8” × 0.7”

Main crystal size: 0.7 × 0.6 cm = 0.3” × 0.2”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

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Rear

Hopeite with Smithsonite

RH86L9: Small crystals of this rare hydrated zinc phosphate: Hopeite. Crystals show very sharp faces and edges, with some internal zoning, probably inclusions of Goethite, on a Smithsonite matrix.
The piece is accompanied by a commercial label of Burminco (George Burnham)
Broken Hill, Kabwe  Zambia (±1958)

Specimen size: 13.3 × 9.7 × 3.7 cm = 5.2” × 3.8” × 1.5”

Main crystal size: 0.6 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Parahopeite

RQ37F8: Another classic, but the form of the crystals is much better than most of the other specimens from Broken Hill. Bought in 1948 from Gregory & Bottley, London.
Broken Hill, Kabwe  Zambia (±1948)

Specimen size: 4 × 3 × 2.5 cm = 1.6” × 1.2” × 1.0”

With handwritten note & record from the Folch Collection

Fluorescent long & short UV

Smithsonite

FM96L3: Group of good size and well defined rhombohedral Smithsonite crystals, nearly lenticular habit, yellowish tones and on matrix.
Berg Aukas, Grootfontein  Namibia (±1963)

Specimen size: 7.9 × 7.8 × 4.1 cm = 3.1” × 3.1” × 1.6”

Main crystal size: 0.9 × 0.8 cm = 0.4” × 0.3”

With handwritten note & record from the Folch Collection

Minor fluorescence short UV

Descloizite with Calcite

RG17M3: Very esthetic and aerial group of Descloizite crystals with deep reddish tones. Well defined faces and edges forming parallel growth which remind one of a bird's feather. On matrix.
The piece is accompanied by a handwritten label from Mr. Folch that we’ll send to the buyer.
Berg Aukas, Grootfontein  Namibia

Specimen size: 4.6 × 3.1 × 2.6 cm = 1.8” × 1.2” × 1.0”

Main crystal size: 0.6 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Calcite fluorescent short UV

Descloizite

RP64L3: Group of Descloizite crystals formed by the dipyramid faces and lateral pinacoid, both very brilliant. Specimen shows a nice reddish brown color. In the handwritten label we can read Tsumeb as the locality, but we must advise that in those years many specimens from different deposits and localities from Namibia were mislabeled as Tsumeb.
Berg Aukas, Grootfontein  Namibia

Specimen size: 4.7 × 3 × 2.5 cm = 1.9” × 1.2” × 1.0”

Main crystal size: 1 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Descloizite

RA37G6: Good group of numerous crystals. Every one of the crystals is itself a group of little crystals of delicately curved edges, a typical shape in the classic samples from Namibia. The piece seems to be stalactitic because it is hollow at its base.
Berg Aukas, Grootfontein  Namibia (±1973)

Specimen size: 8.4 × 6 × 4.5 cm = 3.3” × 2.4” × 1.8”

With handwritten note from the Folch Collection

Descloizite

RG87M9: Typical sample from the most productive times in Berg Aukas, with crystals of slightly oval edges, dark and with reddish reflections. The sample, on matrix, is really a classic.
Berg Aukas, Grootfontein  Namibia (±1973)

Specimen size: 12.3 × 7.8 × 3.6 cm = 4.8” × 3.1” × 1.4”

Main crystal size: 1.4 × 0.8 cm = 0.6” × 0.3”

With handwritten note from the Folch Collection

Descloizite

RQ69M3: This specimen shows two well differentiated aspects. on one side crystals resemble a bird's feather, flattened, with good luster and reddish color. On the back side one can see thick Descloizite crystals with very well defined faces and edges and completely black color.
This sample was from Scott J. Williams (Southwest Co.) of Scottsdale, Arizona. The piece is accompanied by Mr. Folch’s handwritten label and card Nr. 9520 from the Folch Collection. We’ll send both to the buyer.
Berg Aukas, Grootfontein  Namibia (±1965)

Specimen size: 12.2 × 9 × 7.2 cm = 4.8” × 3.5” × 2.8”

Main crystal size: 2.4 × 1.4 cm = 0.9” × 0.6”

With handwritten note & record from the Folch Collection

Frontal

Rear

Descloizite

RM69I2: Group of dipyramidal crystals, very well defined, bright and of a clearer color than usual. The dipyramide, as opposed to the most common on samples from Grootfontein, is thick and without curves.
The sample is with a label from John S. Albanese, from New Jersey.
Abenab Mine, Grootfontein  Namibia (±1965)

Specimen size: 7 × 5 × 2.5 cm = 2.8” × 2.0” × 1.0”

Main crystal size: 1 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Tsumeb

Twinned Cerussite

RK96F9: Showing the smoky tones and the transparency of the best Cerussites from Tsumeb. On the front the twin plane is clearly seen.
Tsumeb Mine, Tsumeb  Namibia (±1963)

Specimen size: 3 × 2.8 × 2.4 cm = 1.2” × 1.1” × 0.9”

With handwritten note & record from the Folch Collection

Minor fluorescence short UV

Cerussite

RN16G2: A cyclic twin (very uncommon from Tsumeb and very similar to specimens from Mibladen) with polysynthetic growth. This floating specimen was purchased from W. Maucher in 1953.
Tsumeb Mine, Tsumeb  Namibia (±1953)

Specimen size: 3 × 2.8 × 2.8 cm = 1.2” × 1.1” × 1.1”

With handwritten note & record from the Folch Collection

Intense Fluorescence long & short UV

Cerussite with Duftite

RT96F9: A prismatic crystal with magnificent faces on the top and the esthetic counterpoint of spherical green aggregates of Duftite.
Tsumeb Mine, Tsumeb  Namibia (±1963)

Specimen size: 3.8 × 2.2 × 2.1 cm = 1.5” × 0.9” × 0.8”

With handwritten note & record from the Folch Collection

Minor fluorescence short UV

Cerussite

Front
Side

RK36Q5: Elongated twinned prismatic crystals. They are translucent and bright and have very well defined faces and edges.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 4.3 × 1.7 × 1.4 cm = 1.7” × 0.7” × 0.6”

With handwritten note from the Folch Collection

Minor fluorescence short UV

Twinned Cerussite

RQ56M3: Radial group of yellowish Cerussite cyclic twins, with very sharp faces and edges on a Limonite matrix.
This sample was purchased in 1961 in the Comtoir N. Boubée & Cie in Paris. We will send to the buyer the Boubée label, with the handwritten notes of Mr. Folch, and the card from the Folch Collection (Nr. 2429).
Tsumeb Mine, Tsumeb  Namibia (±1961)

Specimen size: 4.5 × 3.4 × 3 cm = 1.8” × 1.3” × 1.2”

Main crystal size: 2 × 1.3 cm = 0.8” × 0.5”

With handwritten note & record from the Folch Collection

Minor fluorescence short UV

Front
Side

Cerussite with Smithsonite

RY64M2: Tabular Cerussite crystals showing perfect cyclic twins. The color is slightly smoky, but with an excellent transparency and brilliance. On a rich dark Smithsonite crystal matrix.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 5.5 × 3.7 × 3.2 cm = 2.2” × 1.5” × 1.3”

Main crystal size: 1 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Fluorescent long & short UV

Cerussite with Smithsonite and Azurite

RF63H8: An excellent miniature in which Cerussite forms cyclic twins. It has very well defined and bright faces free of damage. The paragenesis is interesting, with Smithsonite and Azurite on the matrix.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 3.7 × 3.3 × 2.8 cm = 1.5” × 1.3” × 1.1”

Main crystal size: 2 × 1.8 cm = 0.8” × 0.7”

With handwritten note from the Folch Collection

Azurite with Cerussite

RQ62J7: Very well defined prismatic crystals, some of them doubly terminated, on a matrix very rich of small white crystals of Cerussite.
Tsumeb Mine, Tsumeb  Namibia (±1979)

Specimen size: 4.3 × 3.3 × 1.7 cm = 1.7” × 1.3” × 0.7”

Main crystal size: 0.8 × 0.2 cm = 0.3” × 0.1”

With handwritten note from the Folch Collection

Dioptase with Calcite

RL36G2: Very well defined crystals with perfect color and luster, partially covered by Calcite on a matrix of crystallized Dolomite.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 2.9 × 2.7 × 2.4 cm = 1.1” × 1.1” × 0.9”

Main crystal size: 1.1 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Front
Side

Dioptase with Smithsonite

RC96F8: Complex, doubly terminated crystals on a harmonious matrix, with Smithsonite. A highly elegant miniature.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 4 × 2.4 × 1.4 cm = 1.6” × 0.9” × 0.6”

Main crystal size: 1.4 × 0.8 cm = 0.6” × 0.3”

With handwritten note from the Folch Collection

Dioptase with Calcite

RR26H8: An attractive sample with a lot of doubly terminated crystals, bright and with a magnificent color contrasting with the matrix of white Dolomite.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 4.5 × 3 × 3.3 cm = 1.8” × 1.2” × 1.3”

Main crystal size: 0.7 × 0.3 cm = 0.3” × 0.1”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Dioptase with Calcite

Front
Side

RG67H9: A classic. Crystals, even though small, have very well defined faces and edges and extraordinary color and luster that contrasts with the white Calcite of the matrix.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 5 × 3.8 × 2.9 cm = 2.0” × 1.5” × 1.1”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Dioptase with Calcite

RA58K4: Small crystals of Dioptase with good luster and color, partially covered by Calcite micro-crystals and on matrix of Calcite rhombohedrons.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 6.8 × 6.6 × 4.7 cm = 2.7” × 2.6” × 1.9”

Main crystal size: 0.2 × 0.1 cm = 0.1” × 0.0”

With handwritten note from the Folch Collection

Calcite minor fluorescence long & short UV

Dioptase with Calcite

RC6K9: Layer of small but very bright and good color Dioptase crystals covering a white-yellowish rhombohedral Calcite matrix.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 7.5 × 4.4 × 3.8 cm = 3.0” × 1.7” × 1.5”

With handwritten note from the Folch Collection

Calcite very fluorescent long & short UV

Dioptase with Calcite

RB26J7: Small crystals formed by the prism and acute terminations of the rhombohedron, which selectively occupied the surface of some of the faces of the white rhombohedrons of Calcite.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 8.5 × 5.4 × 5.1 cm = 3.3” × 2.1” × 2.0”

Main crystal size: 0.2 × 0.1 cm = 0.1” × 0.0”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Dioptase on Calcite

Front
Rear

RD92G6: Undamaged crystals with a magnificent color and luster and some of them are doubly terminated. Beautifully positioned on a matrix of white Calcite, the piece is ideal for any collection. A great specimen.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 7.7 × 5.2 × 4.8 cm = 3.0” × 2.0” × 1.9”

Main crystal size: 1.2 × 0.7 cm = 0.5” × 0.3”

With handwritten note from the Folch Collection

Calcite with Duftite

RD14S7: Aggregate of complex doubly terminated crystals of Calcite. They are very transparent, colorless and bright, with dendritic growths of clear green Duftite which almost completely coats the back side of the piece.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 7.2 × 4.8 × 3.8 cm = 2.8” × 1.9” × 1.5”

Main crystal size: 0.6 × 0.5 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Front
Rear

Mottramite with Calcite

RM64K4: Concretions and arborescent growths of Mottramite of attractive green color, on crystals of Calcite.
Tsumeb Mine, Tsumeb  Namibia (±1979)

Specimen size: 5.7 × 4.9 × 3 cm = 2.2” × 1.9” × 1.2”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Smithsonite with Cuprite inclusions

RF47I2: Group of crystals on matrix. Those crystals, of round aspect, are complex but the rhombohedron dominates. Their color is yellowish-green, very attractive and emphasized by red inclusions of Cuprite.
Tsumeb Mine, Tsumeb  Namibia (25-07/1973)

Specimen size: 8 × 5.2 × 2.5 cm = 3.1” × 2.0” × 1.0”

Main crystal size: 0.5 × 0.5 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Smithsonite

RL61J1: Drusy group of complex crystals. They are bright and the green color is more intense than usual on this kind of specimen.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 5.5 × 4.2 × 1.8 cm = 2.2” × 1.7” × 0.7”

Main crystal size: 0.3 × 0.3 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Smithsonite with Cuprite inclusions

RM76P8: A group of crystals on matrix. They have a rounded aspect but is possible to see the dominant faces of the rhombohedron. Their yellowish green color is attractive and they have reddish shades due Cuprite inclusions.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 6.7 × 4.8 × 2.5 cm = 2.6” × 1.9” × 1.0”

Main crystal size: 0.4 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Smithsonite with Cuprite inclusions

RE96I2: A druse of complex crystals in which the rhombohedron is dominant. Crystals have a round aspect and have yellowish-green color with red inclusions of Cuprite.
Tsumeb Mine, Tsumeb  Namibia (25-07/1973)

Specimen size: 8.3 × 3.8 × 2.1 cm = 3.3” × 1.5” × 0.8”

Main crystal size: 0.4 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Smithsonite

RM67P8: Group of rhombohedral crystals of good size, with very well defined faces and edges, slightly pinkish and on matrix. A classic.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 10 × 8.5 × 7.8 cm = 3.9” × 3.3” × 3.1”

Main crystal size: 0.8 × 0.7 cm = 0.3” × 0.3”

With handwritten note from the Folch Collection

Smithsonite

RA91J3: An excellent specimen, very rich in rhombohedral crystals of good color.
The sample was valued for the first time in 1973 and it is with a label of Albert Salada, from Aiguafreda, Barcelona, that we’ll send to the buyer.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 13.5 × 10 × 7.8 cm = 5.3” × 3.9” × 3.1”

Main crystal size: 1.1 × 0.9 cm = 0.4” × 0.4”

With handwritten note from the Folch Collection

Cuprian Smithsonite

RG46F8: Extraordinary color and brilliance. The crystal definition is also magnificent.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 4 × 2.9 × 1.4 cm = 1.6” × 1.1” × 0.6”

Main crystal size: 0.2 × 0.2 cm = 0.1” × 0.1”

With handwritten note & record from the Folch Collection

Smithsonite (cadmium rich)

RA58G0: A rare variety of Smithsonite. The color, brightness and sharpness of crystals are excellent, and also its position on the matrix.
Tsumeb mine, Tsumeb  Namibia

Specimen size: 6.4 × 4.3 × 3.4 cm = 2.5” × 1.7” × 1.3”

Main crystal size: 0.7 × 0.7 cm = 0.3” × 0.3”

With handwritten note from the Folch Collection

Mimetite with Duftite

RR12I8: Globular growths of small, very sharp, dipyramidal crystals. They have a nice yellow color and are on a matrix with green Duftite.
Tsumeb Mine, Tsumeb  Namibia (±1979)

Specimen size: 3.6 × 2 × 2.5 cm = 1.4” × 0.8” × 1.0”

Main crystal size: 0.9 × 0.8 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Mimetite with Malachite

RV16T5: Spherical growths of very acute small dipyramidal clear yellow crystals of Mimetite, with Malachite and on matrix. Different than usual for Tsumeb.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 8.8 × 6 × 5.6 cm = 3.5” × 2.4” × 2.2”

Main crystal size: 0.7 × 0.7 cm = 0.3” × 0.3”

With handwritten note from the Folch Collection

Minor fluorescence long UV

Mimetite with Dolomite

RZ64I8: Nice miniature. The crystals consist of the prism and steep dipyramids that form the terminations, their faces and edges are very well defined, the luster is bright and the color is extraordinarily deep so that they strongly contrast with the white Dolomite matrix.
Tsumeb Mine, Tsumeb  Namibia (±1979)

Specimen size: 3.4 × 2.5 × 2.9 cm = 1.3” × 1.0” × 1.1”

Main crystal size: 0.9 × 0.4 cm = 0.4” × 0.2”

With handwritten note from the Folch Collection

Fluorescent long & short UV

Wulfenite with Mimetite and Calcite

Front
Side

RF86K4: Group of tabular crystals of Wulfenite of good color and excellent luster with a curious columnar formation of Mimetite. The sample is completed with small crystals of white Calcite.
Tsumeb Mine, Tsumeb  Namibia (±1979)

Specimen size: 3.9 × 3.7 × 3.6 cm = 1.5” × 1.5” × 1.4”

Main crystal size: 1.3 × 1.1 cm = 0.5” × 0.4”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Copper with Cuprite and Calcite

RE86H0: A magnificent miniature. Being known from Tsumeb, Copper isn’t one of the most frequent species found there. The piece has arborescent growths, with decahedral crystals of Cuprite, all on a matrix of white crystals of Calcite.
Tsumeb Mine, Tsumeb  Namibia (±1973)

Specimen size: 3.2 × 2.4 × 1.9 cm = 1.3” × 0.9” × 0.7”

With handwritten note from the Folch Collection

Calcite fluorescent long & short UV

Front

Top

Cuprite

RE96H0: A group of very bright crystals formed by the faces of the cube and the octahedron. On the bottom of the sample there is some coverage of a green mineral, perhaps Bayldonite.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 3.1 × 2.2 × 0.9 cm = 1.2” × 0.9” × 0.4”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Cuprite

RX47H7: Crystal group of very splendent luster, formed by the dominant octahedron. Because it was found long ago and still possesses its original luster, we think it can be maintained indefinitely if the sample is protected from sun light.
Tsumeb Mine, Tsumeb  Namibia (±1969)

Specimen size: 2.4 × 2.4 × 1.8 cm = 0.9” × 0.9” × 0.7”

Main crystal size: 0.9 × 0.7 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Cuprite with Calcite

RV37H7: Crystal group of very splendent luster and excellent color formed by the cube and the octahedron and partially covered by Calcite. Because it was found long ago and still possesses its original luster, we think it can be maintained indefinitely if the sample is protected from sun light.
Tsumeb Mine, Tsumeb  Namibia (±1969)

Specimen size: 3.2 × 2.3 × 1.5 cm = 1.3” × 0.9” × 0.6”

Main crystal size: 0.5 × 0.5 cm = 0.2” × 0.2”

With record from the Folch Collection

Cuprite with Malachite and Calcite

RY16H0: A group of very bright crystals formed by the faces of the cube and the octahedron. On the upper part of the sample there is a little coverage of Calcite with Malachite.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 3.7 × 2.5 × 1.3 cm = 1.5” × 1.0” × 0.5”

Main crystal size: 0.4 × 0.2 cm = 0.2” × 0.1”

With handwritten note from the Folch Collection

Cuprite with Calcite and Malachite

RV76K9: Cuboctahedral Cuprite crystals with good color and excellent luster, accompanied by Malachite and small Calcite veins.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 4.5 × 3.3 × 3.2 cm = 1.8” × 1.3” × 1.3”

Main crystal size: 0.3 × 0.3 cm = 0.1” × 0.1”

With handwritten note from the Folch Collection

Cuprite with Wulfenite

RQ66K9: Group of cubic Cuprite crystals with slight curves. On the Cuprite crystals one can find laminar Wulfenite crystals, which is very uncommon.
Tsumeb Mine, Tsumeb  Namibia (1973)

Specimen size: 7.0 × 5.8 × 4.8 cm = 2.8” × 2.3” × 1.9”

Main crystal size: 0.5 × 0.4 cm = 0.2” × 0.2”

With handwritten note from the Folch Collection

Spodumene

Front

Rear

RT17P8: Excellent doubly terminated floater crystal, without cleavages and with curvatures on some faces and edges. Its color varies between very pale yellow and green. The transparency is very good in the entire crystal.
Barra do Cuiete, Minas Gerais  Brazil (±1954)

Specimen size: 11.8 × 1.5 × 1 cm = 4.6” × 0.6” × 0.4”

With handwritten note from the Folch Collection

Minor fluorescence long & short UV

Phenakite

RA12M2: From the most classic locality for the species. It is a typical flattened crystal with predominant rhombohedra very, very flattened forms as terminal faces and with poorly developed prism faces forming a very thin fillet around the crystal.
Rio Piracicaba (São Miguel de Piracicaba), Minas Gerais  Brazil

Specimen size: 2.1 × 1.5 × 1.1 cm = 0.8” × 0.6” × 0.4”

With handwritten note from the Folch Collection

Phenakite

RY58N4: Small crystal with very well defined faces and edges. It is transparent and bright and it is from probably the most classical locality for the species.
Rio Piracicaba, (São Miguel de Piracicaba), Minas Gerais  Brazil

Specimen size: 1.4 × 1.3 × 1 cm = 0.6” × 0.5” × 0.4”

With handwritten note from the Folch Collection

Titanite

RR59Q5: Twinned translucent crystal, transparent at the top termination and with an excellent yellow-green color.
Capelinha, Minas Gerais  Brazil (±1967)

Specimen size: 2.2 × 1.5 × 0.7 cm = 0.9” × 0.6” × 0.3”

With handwritten note from the Folch Collection

Rose Quartz

RP56F8: A scepter growth of parallel, doubly terminated crystals on a prism of milky Quartz. The color of the rose Quartz is very pleasant, as is the form of the scepter. Mr. Martin Ehrmann, of California, gave it to Sr. Folch.
Minas Gerais  Brazil (±1964)

Specimen size: 4.4 × 2.2 × 1.6 cm = 1.7” × 0.9” × 0.6”

With handwritten note & record from the Folch Collection

Rose Quartz on smoky Quartz and Muscovite

RB47H7: The specimen is extraordinary. Crystals have very sharp faces and edges, they are bright and transparent and form an elegant crown contrasting with the smoky quartz crystal matrix. On the back, the sample is partially covered by Muscovite. We call attention especially to the extraordinary deep pink color, deeper than usual, and also the definition of most of the crystals.
Alto da Pitorra, Laranjeiras, Galiléia, Vale do Rio Doce, Minas Gerais  Brazil (±1967)

Specimen size: 8.7 × 7 × 4.4 cm = 3.4” × 2.8” × 1.7”

Main crystal size: 1.1 × 0.8 cm = 0.4” × 0.3”

With handwritten note from the Folch Collection

Front
Side

Doubly terminated Chrysoberyl

Front
Top

RV89H7: Complete cyclic twin of three interpenetrating crystals (“sixling”). It has deep yellow color and excellent luster and a considerable transparency. An excellent specimen.
Tancredo, Santa Teresa, Espirito Santo  Brazil (1964)

Specimen size: 3 × 2.1 × 2.2 cm = 1.2” × 0.8” × 0.9”

With record from the Folch Collection

Doubly terminated Chrysoberyl

RP97H7: A great twin, complete, deep yellow color and excellent luster and a considerable transparency. Original shape!
Tancredo, Santa Teresa, Espirito Santo  Brazil (1964)

Specimen size: 3.2 × 2 × 1.8 cm = 1.3” × 0.8” × 0.7”

With handwritten note from the Folch Collection

Elbaite (Rubellite) with Albite

Front

Side

RA72J5: Crystals composed of striated prism faces and terminated by a rough and poorly defined pedion face. We specially note its very deep color.
Minas Gerais  Brazil

Specimen size: 10.9 × 3.2 × 2.9 cm = 4.3” × 1.3” × 1.1”

Main crystal size: 10.8 × 2.7 cm = 4.3” × 1.1”

With record from the Folch Collection

Elbaite "watermelon"

RQ26L3: If we pay attention on the label date (1980) we could consider that this specimen must be part of the first “Watermelon” found in Santa Rosa. The crystal shows a marked color zoning and an excellent transparency and brilliance.
Santa Rosa Mine, Itambacuri, Minas Gerais  Brazil (±1980)

Specimen size: 3.6 × 0.7 × 0.7 cm = 1.4” × 0.3” × 0.3”

With handwritten note from the Folch Collection

Front

Rear
Top

Elbaite "Watermelon"

RN96H7: Prismatic crystal with an excellent termination. The color zonation is very well marked with the inner core between red and mauve and the bluish green exterior. It is curious to find this piece in the Folch collection because he purchased it before 1980, so it could be one of the first “watermelons” found at the locality.
Santa Rosa Mine, Itambacuri, Minas Gerais  Brazil (±1980)

Specimen size: 3.6 × 1 × 0.9 cm = 1.4” × 0.4” × 0.4”

With record from the Folch Collection

Elbaite 'Watermelon'

RN67F8: Before the find of watermelon specimens from the Santa Rosa Mine people had already found other ones. Sr. Folch bought this in 1964 in New York and it is a good size with a deeper color than the ones from Santa Rosa.
Governador Valadares, Minas Gerais  Brazil (±1964)

Specimen size: 3.1 × 1.5 × 1.4 cm = 1.2” × 0.6” × 0.6”

With handwritten note & record from the Folch Collection

Elbaite (Indicolite)

Front
Rear

RQ56R0: Very transparent prismatic crystal with a rough termination. The blue color is especially intense, well defined and uniform throughout most of the prism.
Golconda pegmatite, Governador Valadares, Vale do rio Doce, Minas Gerais  Brazil (±1965)

Specimen size: 7.4 × 0.5 × 0.4 cm = 2.9” × 0.2” × 0.2”

With handwritten note from the Folch Collection

SOUTH AMERICA (EXCL. BRAZIL)

Acanthite

RL63J1: Very aerial group of complex crystals, very rich with faces and considerably bright. Although on the label the only locality is Chile, we can presume, by its characteristics, it is from Copiapó area.
The specimen is with a label from the now defunct company Suministros Escolares de Barcelona (SEC). We will send the label to the buyer.
Copiapó, Atacama  Chile

Specimen size: 2.7 × 1.3 × 0.8 cm = 1.1” × 0.5” × 0.3”

Main crystal size: 0.7 × 0.4 cm = 0.3” × 0.2”

With handwritten note from the Folch Collection

Copper

Front
Rear

RA96G2: A floating specimen with platy crystals in an arborescent growth. The locality is very well-known but specimens, especially of high quality like this, are actually very scarce.
Corocoro, Provincia Pacajes, Departamento La Paz  Bolivia (±1980)

Specimen size: 14.8 × 4 × 1.5 cm = 5.8” × 1.6” × 0.6”

With handwritten note from the Folch Collection

Cylindrite

RJ96G0: An attractive and classic specimen of this rare sulphosalt in which crystals, with a typical cylindrical habit, take a very pleasant disposition, quite detached and sharp.
Poopó, Oruro  Bolivia

Specimen size: 3.8 × 3.5 × 2 cm = 1.5” × 1.4” × 0.8”

With handwritten note from the Folch Collection

ASIA - AUSTRALIA

Diopside

RQ59M0: Excellent miniature. This Diopside crystal has very sharp faces and edges, also an excellent deep color and brilliance.
The handwritten Folch label indicates that it was self-collected by Mr. Folch in 1980 and we can be sure that it was one of the first Diopside specimens from this locality to come to Europe.
Nuristan  Afghanistan (±1980)

Specimen size: 2.9 × 1.3 × 0.8 cm = 1.1” × 0.5” × 0.3”

With handwritten note from the Folch Collection

Diopside

RR8P8: Probably this is one of the first Diopside crystals from Afghanistan to arrive in Europe, due to the fact that it was obtained at the locality by Alberto Folch in 1980, as the original label says. The single crystal has very well defined faces and edges, a very deep and uniform green color and it is rather transparent.
Nuristan  Afghanistan (±1980)

Specimen size: 2.9 × 0.7 × 0.6 cm = 1.1” × 0.3” × 0.2”

With handwritten note from the Folch Collection

Corundum (Ruby)

TT36I8: Crystals sit on rock matrix and have a near tabular habit. Their terminations have very well marked triangular forms. Color is quite good and they have some degree of transparency, visible under a strong light.
Mysore, Chamraj  India (±1973)

Specimen size: 4.5 × 3 × 2.3 cm = 1.8” × 1.2” × 0.9”

Main crystal size: 1.8 × 1.4 cm = 0.7” × 0.6”

With handwritten note from the Folch Collection

Fluorescent long UV & minor fluorescence short UV

Molybdenite

RY87I2: The floating crystal has considerable size and it is very much defined as usual on samples of this size. On the front face is easy to see the hexagonal striations formed while the crystal grew. It is from a deposit actually that is now finished.
Shirakawamura, Gifu, Chubu, Honshu Island  Japan (±1961)

Specimen size: 6.3 × 4.6 × 3 cm = 2.5” × 1.8” × 1.2”

With handwritten note from the Folch Collection

Front

Rear

Smoky Quartz

Front
Top

RJ96H8: The locality is really interesting for its rarity, but we add that the sample is very esthetic, very well preserved and it has a deep smoky color, with darker inner inclusions.
Eonyang, Kyeongsangnamdo  South Korea (±1974)

Specimen size: 8 × 6 × 6.5 cm = 3.1” × 2.4” × 2.6”

Main crystal size: 6.5 × 1.5 cm = 2.6” × 0.6”

With handwritten note from the Folch Collection

Quartz (Amethyst)

RV76H7: Beautiful miniature. It is a group of crystals having an extraordinary deep color. Faces and edges are so sharp that they seem polished. The locality itself is very original.
Eonyang, Kyeongsangnamdo  South Korea (±1974)

Specimen size: 3.5 × 2.6 × 1.6 cm = 1.4” × 1.0” × 0.6”

Main crystal size: 1.2 × 0.9 cm = 0.5” × 0.4”

With handwritten note from the Folch Collection

Scheelite with Quartz and Dolomite

Front
Under intense light

Top

RQ73H0: Actually the pieces of Scheelite from Korea are now really rare. On this one the perfect definition of faces an edges on the pyramidal crystal and also its luster is specially interesting. The Scheelite is, at the same time with a perfectly formed crystal of Quartz, partially covered by Dolomite. To all this we must add its very original lilac-purple color, visible under a very intense light, as the picture shows.
Tong-Wha Mine, Neungam-ri, Chungju  South Korea (±1974)

Specimen size: 5.5 × 3.7 × 3.4 cm = 2.2” × 1.5” × 1.3”

Main crystal size: 3.6 × 3.5 cm = 1.4” × 1.4”

With handwritten note from the Folch Collection

Intense fluorescence short UV & fluorescent long UV

Australia

Zircon

RP10M5: The crystal is formed by the very well defined forms of a prism and a dipyramid. It is translucent and has slightly pinkish shades in some zones. The sample is of an uncommon quality for the locality.
Mud Tank, Harts Ranges, Northern Territory  Australia (±1968)

Specimen size: 2.4 × 2.1 × 1.8 cm = 0.9” × 0.8” × 0.7”

With handwritten note from the Folch Collection

Scholzite

RB46L3: Classic specimen of Scholzite that could come from the last 1960s find. Sprays of white acicular crystals in a closed vug, with some inclusions of clay and on a cavernous Dolomite matrix. Specimens of this rare hydrated calcium and zinc phosphate are scarce.
Reaphook Hill, Martins Well, Finders Rangers, S. Australia  Australia (±1968)

Specimen size: 6.6 × 4.5 × 2.9 cm = 2.6” × 1.8” × 1.1”

Main crystal size: 1.6 × 0.1 cm = 0.6” × 0.0”

With handwritten note from the Folch Collection

Molybdenite with Quartz

RY17H0: The crystal, as usual in Molybdenite samples, is slightly deformed but it has a good part of its hexagonal outline and it is very well positioned on the Quartz matrix.
Kingsgate, New England District, New South Wales  Australia (±1920)

Specimen size: 5 × 4 × 3.2 cm = 2.0” × 1.6” × 1.3”

Main crystal size: 4 × 3.6 cm = 1.6” × 1.4”

With handwritten note & record from the Folch Collection

Népouite

RB13S7: The sample is a classic for the species and has a high quality due to its color, the crystalline aspect of the Népouite and the silky luster. The original label indicates that it was acquired by Folch from Deyrolle (Paris) in 1933.
  New Caledonia (±1933)

Specimen size: 9 × 7 × 2.3 cm = 3.5” × 2.8” × 0.9”

With handwritten note from the Folch Collection

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