Chalcocite

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Chalcocite 
Frequency common 
Hardness 3.5 
Density 4.1
Chemical Formula Cu2S 
Core Elements Cu 
Thermal Decomposition
Cu2S
666°C
CuO

Chalcocite, along with malachite and azurite is a primary ore of copper. It is a mixture of different copper-sulfur compounds, with occasional iron substitutions. Copper-sulfur proportions include 9:5 (digenite), 6:4 or 5:4 (bornite), 2:1 (chalcocite) and 1:1 (covellite).

See Also

  • covellite (CuS)