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Acanthite Psm Argentite

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PDM729302

Acanthite Psm Argentite

Pseudomorph

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 1.8 × 1.6 cm
Description

Group of grey, well defined elongated pseudo-octahedral crystals of acanthite. This specimen is a classic example of a paramorph (acanthite after argentite), where the original isometric symmetry of the argentite is morphologically inherited by the acanthite, that is monoclinic. The specimen is crystallized all around and completely free of damage. Mounted on a socle.

Ex. Dr. Bob Janssens specimen, #2076.

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

Current price

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10
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Start 18 Jul 18:00
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Belgium
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13

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