Fabre Minerals
FABRE MINERALS
High quality mineral specimens
Bringing you selected collectible minerals since 1971
Fabre Minerals


May 2010 Update

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FROM THE DESMOND SACCO COLLECTION


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

 


Desmond Sacco is an authority when it comes to African as well as worldwide minerals. I met him many years ago at the Munich Show when it was in the city of Munich and Desmond was one of the stars of the show, buying the best that appeared there. His collection was legendary, not only because of the wonders we knew he would certainly have acquired given his position in the mines of the Kalahari Manganese Field (Hotazel, Wessels, N'Chwaning.) and his proximity to the legendary Tsumeb, but also because we saw what he was buying, and thus got an idea of the quality of his collection.

Many years and many mineral Munich shows have now passed and, for the first time, Desmond Sacco has decided to sell some specimens from his collection, starting with miniatures and thumbnails and some cabinet specimens. We have been fortunate to acquire the first batch, consisting of material from Tsumeb and the Kalahari, and with these we can make a virtual trip to the mines and minerals guided by Desmond and his collecting criteria.


From the web page of Desmond Sacco

Desmond does not have any labels for these specimens, so we can't include them. We know it would be better if he had a pedigree related with each specimen from his collection, but the specimens are "as they are," without any label, other than ours. Anyway, Desmond Sacco kindly revised this page, just to be sure that everything is accurate.

We hope you enjoy these samples, which represent an important part of mineralogy and mineral collecting in Africa.

Jordi Fabre

Gaudefroyite
Gaudefroyite.

TG36Q5: Group of doubly terminated crystals, perfectly defined. They are formed by the prism and the dipyramid, with an excellent luster. Crystal size is notable for the species.
Black Rock Mine, Black Rock, Kalahari  South Africa

Specimen size: 1.8 × 1.3 × 0.9 cm = 0.7” × 0.5” × 0.4”

Main crystal size: 1.4 × 0.5 cm = 0.6” × 0.2”

Former Desmond Sacco collection


Sold
Rhodochrosite

TC57Q5: Aggregate of crystals formed by the prism and the faces of flattened rhombohedra on the terminations. Color is intense, very vivid, pink with white zoning and the luster is excellent. The piece has great quality, both front and back.
N'Chwaning II Mine, Kuruman, Kalahari  South Africa

Specimen size: 3.6 × 2.7 × 2.2 cm = 1.4” × 1.1” × 0.9”

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

Former Desmond Sacco collection

Fluorescent long & short UV

Rhodochrosite. Front
Front
Rhodochrosite. Rear
Rear
Sold
Hematite with Calcite and Celestine
Hematite with Calcite and Celestine. Front
Front
Hematite with Calcite and Celestine. Rear
Rear

TA47Q5: Twinned Hematite crystal with a very good luster and very well defined faces and edges, positioned esthetically on its matrix of white Calcite that gives a nice contrast to the piece.
Black Rock Mine, Black Rock, Kalahari  South Africa

Specimen size: 3.6 × 2.5 × 2.4 cm = 1.4” × 1.0” × 0.9”

Main crystal size: 2.2 × 1.6 cm = 0.9” × 0.6”

Former Desmond Sacco collection


Sold
Inesite with Calcite

TR50Q5: Globular growth of acicular crystals. It has very deep color and small groups of very acute scalenohedral crystals of Calcite.
N'Chwaning II Mine, Kuruman, Kalahari  South Africa

Specimen size: 6.9 × 4.2 × 2.9 cm = 2.7” × 1.7” × 1.1”

Former Desmond Sacco collection

Calcite fluorescent long & short UV

Inesite with Calcite. Inesite with Calcite.
Sold
Anglesite with Galena
Anglesite with Galena. Front
Front
Anglesite with Galena. Rear
Rear

TF28Q5: Parallel growths of crystals with very well defined faces and edges, a bluish-gray color, and implanted on a small matrix. We note the quality of the crystals due to the locality, in which the Anglesite is well known but, at the same time, scarce.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 4.2 × 2.2 × 2 cm = 1.7” × 0.9” × 0.8”

Main crystal size: 3.5 × 1.5 cm = 1.4” × 0.6”

Former Desmond Sacco collection


Order
Cuprite with Malachite

TC27Q5: Group of dodecahedral crystals with very well defined faces and edges, with thin coatings of Malachite on some areas of the crystals and deep red transparency under a strong light.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 2.4 × 1.4 × 1.3 cm = 0.9” × 0.6” × 0.5”

Main crystal size: 1.7 × 1.4 cm = 0.7” × 0.6”

Former Desmond Sacco collection


Cuprite with Malachite. Front
Front
Cuprite with Malachite. Rear
Rear
Sold
Mimetite with Galena
Mimetite with Galena.

TD67Q5: Group of crystals of considerable length for the species, some of them doubly terminated, with vivid yellow color, translucent and very bright, formed by an elongated prism and the terminal faces of a pyramid.
Tsumeb Mine, Tsumeb  Namibia

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

Main crystal size: 2.4 × 0.3 cm = 0.9” × 0.1”

Former Desmond Sacco collection


Order
Dioptase with Calcite

TF47Q5: Group of crystals on matrix, some of them doubly terminated, with very well defined faces and edges. Furthermore, they have excellent luster and color.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 3.4 × 2.9 × 1.9 cm = 1.3” × 1.1” × 0.7”

Main crystal size: 0.9 × 0.3 cm = 0.4” × 0.1”

Former Desmond Sacco collection

Calcite fluorescent long & short UV

Dioptase with Calcite. Front
Front
Dioptase with Calcite. Rear
Rear
Sold
Smithsonite with Cuprite and Malachite
Smithsonite with Cuprite and Malachite. Smithsonite with Cuprite and Malachite.

TB66Q5: Group of Cuprite crystals with very well defined faces and edges. The crystals are partially pseudomorphed by Malachite, on a group of clear cream deformed crystals of Smithsonite of spheroidal aspect.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 5.2 × 3.4 × 2.2 cm = 2.0” × 1.3” × 0.9”

Minor fluorescence long & short UV

Order
Smithsonite

TD47Q5: Crystal, on matrix, with very well defined faces and edges, unusually elongated for the species and formed by a ditrigonal prism and an acute terminal rhombohedron. We specially note the degree of transparency, rare with Smithsonite crystals.
Tsumeb Mine, Tsumeb  Namibia

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

Main crystal size: 1.8 × 0.4 cm = 0.7” × 0.2”

Former Desmond Sacco collection


Smithsonite. Front
Front
Smithsonite. Rear
Rear
Sold
Smithsonite
Smithsonite. Front
Front
Smithsonite. Rear
Rear

TE67Q5: Clear yellow crystal formed by a ditrigonal prism and a very acute terminal rhombohedron. The termination below, even not being especially defined, is complete.
Tsumeb Mine, Tsumeb  Namibia

Specimen size: 2.5 × 1.3 × 1.3 cm = 1.0” × 0.5” × 0.5”

Former Desmond Sacco collection


Order


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