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Dioptase & Calcite

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NST751016

Dioptase & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.7 × 5 × 2 cm
Largest Crystal: 
1.20cm
Description

Highly lustrous emerald-green dioptase up to 1.2 cm on a satin-white Calcite matrix. A showy display specimen from Tsumeb Mine.

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