Class: Native element
Hardness: 2.5 - 3
Habit: Massive, platey or dendritic habit.
Colours: Light rose on fresh surface, copper-red on tarnished surface
| ||Crystal System: Isometric|
Reaction with HCl: Weak
Identification in hand sample:
Colour and metallic characteristics are diagnostic.
Found associated with mafic volcanic rocks, formed by reaction between Cu-bearing solutions and Fe-bearing minerals. Associated minerals are cuprite, chalcocite, bornite, epidote, calcite, chlorite and zeolites.
Industrial / ecomonic uses:
Used as electrical wire due to electrical conductivity and relatively low price.
Obviously a source of copper, however most copper in modern times is mined from sulfide minerals.