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Cotunnite & Dioptase

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JYJ696264

Cotunnite & Dioptase

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 0.7 × 0.6 cm
Description

SEM-EDS & Raman analysed new find from Tsumeb. The cotunnite is coating another spherical Cu arsenate on Zn rich dolomite with minor dioptase. 

Last sample from this very limited new find. 

Mineral Data
What's on the rock

Cotunnite

Formula: 
PbCl2
Strunz: 
3.DC.85
Hardness: 
1.5 - 2.0
Type Locality: 
Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy

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...
Analysis
Analysis Report - only: Cotunnite & Dioptase
Analysis Report - only: Cotunnite & Dioptase