|Mineral class||Sulphides : Chalcocite group|
|Crystal system||Monoclinic (pseudo-orthorombic).|
|Habitus||Flat pseudohexagonal crystals. Usually massive grainy aggregates.|
|Cleavage||Imperfect in two prismatic directions.|
|Hardness||2.5 - 3|
|Density||5.5 - 5.8|
|Color||Grayish black, opaque.|
|Streak||Shiny black to dark gray.|
|Description||Chalcosite is an important copper ore.|
|Occurance||Forms in hydrothermal veins and below the oxidation zone of copper deposits. Also found in sedimentary rocks.|
Often found with a dull tarnish.|
Easily soluble in nitric acid.
Green color in a flame.
|Localities|| Found only in a few of the copper ores in Sweden |
| To sulphides index.
|| Mineral group index.
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