Picture pending, acanthite from Garpenberg.
|Mineral class||Sulphides : Argentite group|
|Habitus||Crystals rare, as pseudocubic crystal groups. Mostly as crusts, dendritic or in massive form.|
|Cleavage|| poor,  poor. Bendable, mallable and cuttable.|
|Hardness||2 - 2.5|
|Color||Led gray, opaque.|
|Occurance||Formed in low temperature hydrothermal veins. Also in the concentration zone in silver deposits.|
Often with dull black tarnish.|
When heated to glowth, metallic silver is formed.
Acanthite is the stable form below 179° C of the cubic argentite.
A not so common mineral in Sweden but found in a number of silver mines.|
| To sulphides index.
|| Mineral group index.
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