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RM395   Bertrandite with smoky quartz and pyrite

Kara-Oba W mines, Betpakdala Desert, Kara-Oba, Karagandy Oblysy, Kazakhstan

A really interesting specimen for its aesthetics, its locality and, of course, by the presence of this rare beryllium silicate, bertrandite. Specimen shows prismatic flattened crystals, well defined, forming rosettes. Perfectly disposed on a matrix of smoky quartz crystals and some brilliant pyrite.


Size: 7,5 x 4,5 x 3,6 cm.
Main crystal: 10 x 2 mm.
Found in ± 1995.



 

RM1567   Octahedral Fluorite with quartz

Kara-Oba W mines, Betpakdala Desert, Kara-Oba, Karagandy Oblysy, Kazakhstan

This octahedral green fluorite is perched on a druse of quartz, with window forms. It shows defined faces and edges. Color is intense with transparence. On a matrix of feldspar. This is from a small tungsten mine that was worked intermittently in the past including by the Russian government as a source for tungsten back in the 1980s. Few good minerals came out, and fewer still in this size and quality.Fluorescent under LW-UV.


Size: 6.6 x 6.4 x 4.8 cm.
Main crystal: 24 x 20 mm.

Fluorescent under long wave UV


 

RM549   Djurleite with chalcocite and chalcopyrite

Dzhezkazgan Mine, Dzhezkazgan, Karagandy, Karaganda Oblast', Kazakhstan

In this specimen we observe groups of brilliant galena crystals showing complex forms with parallel growths. Accompanied by some isolated groups of djurleite crystals, those are distinguished by having less brilliance, greyish tone and iridiscent reddish reflections. Prisms are presented as complex forms, rich in faces, with striations and twinned. Djurleite is an uncommon copper sulfide closely related to chalcocite. Published in LAPIS (2014).


Size: 7,5 x 5,0 x 3,0 cm.
Main crystal: 8 x 3 mm.

 

RM1023   Azurite

Dzhezkazgan Mine, Dzhezkazgan, Karagandy, Karaganda Oblast', Kazakhstan

A floater aggregate of lanceolated sharp azurite crystals with a more than excellent color and luster. From a mine not well represented in collections.


Size: 4.0 x 3.8 x 3.5 cm.
Found in 2007.

 

RM554   Azurite with malachite pseudomorph after azurite

Dzhezkazgan Mine, Dzhezkazgan, Karagandy, Karaganda Oblast', Kazakhstan

A floater aggregate of lanceolated sharp azurite crystals with an excellent color and luster, with small malachite pseudomorph after azurite growths. From a mine not well represented in collections.


Size: 3,5 x 3.0 x 2,7 cm.
Found in 2007.

 

RM553   Azurite with malachite pseudomorph after azurite

Dzhezkazgan Mine, Dzhezkazgan, Karagandy, Karaganda Oblast', Kazakhstan

A very rich specimen formed by several azurite crystals that have been pseudomorphed by malachite showing original lanceolated forms, also tabular crystals with  velvety faces due to fibrous malachite. Azurite, with deep color, crystals also observed partially converted into malachite. The brilliance of both minerals is really good, with superb aesthetics. From a mine not well represented in collections and which nowadays is difficult to obtain fine mineral specimens.


Size: 5,1 x 4,7 x 3,5 cm.
Found in 2007.

 

RM1736   Octahedral fluorite with quartz

Kara-Oba W deposit, Betpakdala Desert, Karagandy, Kazakhstan

This octahedral green fluorite is perched on a druse of quartz, with window forms. It shows defined faces and slightly curved edges. Color is intense with transparence. On a matrix of feldspar. This is from a small tungsten mine that was worked intermittently in the past including by the Russian government as a source for tungsten back in the 1980s. Few good minerals came out, and fewer still in this size and quality.Fluorescent under LW-UV.


Size: 5.7 x 4.8 x 4.2 cm.
Main crystal: 24 x 22 mm.

Fluorescent under long wave UV


Price: 140 € 110 €Buy
 

RM1069   Bornite with chalcopyrite and calcite

Dzhezkazgan Mine, Dzhezkazgan, Karagandy, Kazakhstan

A former bornite specimen of this classic locality for the species. We observe two crystals with a good size and rounded faces and edges. They show an excellent luster and aesthetic iridescence. They are accompanied by a chalcopyrite in a matrix of calcite. A piece with history for the best display.


Size: 10.0 x 7.2 x 4.5 cm.
Main crystal: 20 x 17 mm.
Found in ca. 1990.

 
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