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Reference Specimens
The Desmond Sacco Collection

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Photos by Fabre Minerals. Under Creative Commons license

On this page we have shown the specimens that were in the Desmond Sacco Collection. We didn't want to delete them from our website given 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 classic 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)

 


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


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

Jordi Fabre

The Desmond Sacco Collection


FSU

Sphalerite with Quartz
Sphalerite with Quartz. Front
Front
Sphalerite with Quartz. Side
Side

DE98AC4: Twinned Sphalerite crystal with an octahedral shape and clearly grooved polycrystalline vertices, with very well defined and bright faces and on a Quartz matrix. The sample is from the Desmond Sacco collection, whose label we’ll send to the buyer.
Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region  Russia

Specimen size: 8.2 × 4.5 × 3.5 cm = 3.2” × 1.8” × 1.4”

Main crystal size: 3.3 × 3 cm = 1.3” × 1.2”

With handwritten label from the Desmond Sacco Collection

Calcite with inclusions

DP89AC4: Aggregate of translucent pinkish Calcite crystals formed by a very short prism and a terminal rhombohedron and with a second generation of crystals with a similar shape but white in color and smaller. The sample is from the Desmond Sacco collection, whose label we’ll send to the buyer
Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region  Russia

Specimen size: 9 × 8.5 × 5.8 cm = 3.5” × 3.3” × 2.3”

Main crystal size: 2.9 × 2.7 cm = 1.1” × 1.1”

Fluorescent long & short UV

With handwritten label from the Desmond Sacco Collection

Calcite with inclusions. Calcite with inclusions.
Tourmaline with Quartz (variety smoky), Mica and Feldspar
Tourmaline with Quartz (variety smoky), Mica and Feldspar. Front
Front
Tourmaline with Quartz (variety smoky), Mica and Feldspar. Rear
Rear
Tourmaline with Quartz (variety smoky), Mica and Feldspar. Top
Top

DX94AC4: A dominant crystal with very well defined faces and edges, formed by the ditrigonal prism and the terminal faces of a flattened pyramid and the pinacoid. Its color is between pink and red, quite uniform, with slightly violet shades on some prism areas and it is on a matrix of smoky Quartz, with Lepidolite and unidentified feldspar. The sample is from the Desmond Sacco collection, whose label we’ll send to the buyer.
Krasnyi Chikoy, Chitinskaya Oblast', Transbaikalia (Zabaykalye), East Siberia Region  Russia

Specimen size: 8.9 × 7.2 × 5.6 cm = 3.5” × 2.8” × 2.2”

Main crystal size: 6.7 × 3.8 cm = 2.6” × 1.5”

Fluorescence in the matrix (short and long UV)

With handwritten label from the Desmond Sacco Collection

Stibnite with Baryte

DR26AC7: Divergent groups of Stibnite crystals, some of them with terminations that are very rich in faces. They are on a matrix of very sharp and laminar Baryte crystals.
This specimen was published on the Mineralogical Record΄s web page, in the ‘What's New’ section, number 42, December 10, 2015 edition.
Kadamzhay Mine, Fergana Valley, Alai Range, Osh Oblast  Kyrgyzstan

Specimen size: 5.7 × 4.7 × 2.6 cm = 2.2” × 1.9” × 1.0”

Main crystal size: 4.3 × 0.3 cm = 1.7” × 0.1”

With handwritten label from the Desmond Sacco Collection

Stibnite with Baryte. Front
Front
Stibnite with Baryte. Rear
Rear
Stibnite with Baryte. Side
Side
Corundum
Corundum. Front
Front
Corundum. Side
Side

DD89AC7: Very thick tabular single crystal on matrix. It is very sharp, has very well defined faces and edges and it is translucent, very bright with an intense and deep blue color.
Pit 298, Ilmen Natural Reserve, Ilmenskie Mountains, Chelyabinsk Oblast', Southern Urals, Urals Region  Russia

Specimen size: 4.8 × 4.6 × 3.4 cm = 1.9” × 1.8” × 1.3”

Main crystal size: 4 × 3.6 cm = 1.6” × 1.4”

With handwritten label from the Desmond Sacco Collection



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