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Acanthite Psm Argentite

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PDM624313

Acanthite Psm Argentite

Description Tabs

Description
Locality: 
La Sirena Mine, Guanajuato, Guanajuato Municipality, Guanajuato, Mexico
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.8 × 3.7 cm
Description

Group of dull-metallic well defined pseudo-cubic crystals of acanthite, up to 21 mm in size, very aerial and stacked in parallel growths on a quartz matrix. This is a classic example of a paramorph (acanthite after argentite), where the original cubic symmetry of the argentite is morphologically inherited by the acanthite, that is monoclinic. The specimen is crystallized all around and completely free of damage.

Ex. Tab Farthing (US), #0209. Ex. A.Gelders (BE), #273.

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

Seller Information

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