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Acanthite

About

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Type Locality
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
Mineral Data
Ag2S
Strunz: 
2.BA.35
Physical Properties
Crystal System: 
Monoclinic - Prismatic
Streak: 
lead grey
Hardness: 
2.0 - 2.5
Tenacity: 
sectile
Synonyms
Synonyms: 
Akanthite