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Proustite Acanthite & Calcite

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SCH66169

Proustite Acanthite & Calcite

Description Tabs

Description
Locality: 
Tamdrost, Zagora Province, Drâa-Tafilalet Region, Morocco
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.6 × 3.5 cm
Description

A interesting specimen of acanthite and proustite crystals with calcite from an abandoned Co-Ni mine.

Mineral Data
What's on the rock

Proustite

Formula: 
Ag3AsS3
Strunz: 
2.GA.05
Crystal System: 
Trigonal
Hardness: 
2.0 - 2.5

Acanthite

Formula: 
Ag2S
Strunz: 
2.BA.35
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 2.5
Streak: 
lead grey
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Calcite

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

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