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Acanthite Psm Argentite

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PDM860166

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.3 × 0.8 cm
Description

Group of metallic grey, well-defined pseudo-octahedral crystals of acanthite, arranged in an aesthetic arborescent growth. This specimen is a classic example of a paramorph (acanthite after argentite), where the original isometric symmetry of the argentite is inherited by the acanthite, that is monoclinic. The specimen is crystallized all around and completely free of damages.

Acquired in 1998. Ex Pablo Muñoz specimen.

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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