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Chalcocite & Mimetite

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WND799394

Chalcocite & Mimetite

Classic Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 2.6 × 2.4 cm
Description

This specimen is showing many good, but not perfect, developed crystals of chalcocite accompanied by aicular mimetite. The surface of the chalcocite is slightly rough but mostly undamaged. The mimetite is mostly transparent with a pale yolk yellow colour. The shape of the crystals is hexagonal with a clear horizontal striation.

Mineral Data
What's on the rock

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

Mimetite

Formula: 
Pb5(AsO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Treue Freundschaft Mine, Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany
Wendel Minerals

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