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Dioptase & Mottramite

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CR70527

Dioptase & Mottramite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 5 × 4 cm
Description

This is a very good and attractive dioptase specimen with large, sharp and lustrous crystals on contrasting white calcite matrix.

With olivegreen globular mottramite.

Beautiful specimen from an old German Tsumeb collection.

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...

Mottramite

Formula: 
PbCu(VO4)(OH)
Strunz: 
8.BH.40
Hardness: 
3.0 - 3.5
Type Locality: 
Mottram St Andrew, Cheshire, England, UK