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Acanthite Psm Argentite

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PDM703588

Acanthite Psm Argentite

Ex Udo Hörig, Darmstadt, Germany
Pseudomorph

Description Tabs

Description
Locality: 
Nieder-Beerbach, Mühltal, Darmstadt-Dieburg, Darmstadt, Hesse, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 5.2 × 3.7 cm
Description

A classic example of a paramorph pseudomorph (acanthite after argentite), with lustrous fattened aggregates and microcrystals. The matrix consists of calcite and baryte and it is completely impregned of native silver, so the density is quite high (it weighs 255 g).

Ex. Udo Hörig; Ex. Arnaud Gelders #21.

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

Argentite

Renamed To: 

Acanthite

Formula: 
Ag2S
Strunz: 
2.BA.35
Hardness: 
2.0 - 2.5

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