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Acanthite & Calcite

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PDM673220

Acanthite & Calcite

Description Tabs

Description
Locality: 
Schlema-Hartenstein, Erzgebirge, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 2.6 × 2.5 cm
Description

Group of acute calcite crystals of black colour due to inclusions and overgrowths of lustrous acanthite crystals. Extracted at the Schacht 186, Gang Rhein, Sohle -180 until -150 m.

Ex. A. Gelders collection.

Mineral Data
What's on the rock

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

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