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Dioptase & Calcite

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MGR718984

Dioptase & Calcite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 6.9 × 5.3 cm
Description

Snowy white, sharp terminated, calcite crystals formed at three-dimensional assemble. The center is covered by a layer of sparkling micro-crystals of Dioptase. This combination is very appreciated and hard to obtain. Please note that the camera was not able to capture the intense green colour of Dioptase; the specimen is much better in person.

Mineral Data
What's on the rock

Dioptase

Formula: 
CuSiO3·H2O
Strunz: 
9.CJ.30
Crystal System: 
Trigonal
Hardness: 
5.0
Streak: 
Green
Type Locality: 
Altyn-Tyube dioptase deposit (Altyn-Tube), Altyn-Tyube area, Kirghiz Steppes (Asiatic Steppes), Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Kazakhstan...

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White
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