CuSHexagonal
Covellite
CuS
SulfidesChemical FormulaCuS
Crystal SystemHexagonal
Mohs Hardness1.5
Specific Gravity4.68
ColorIndigo blue to black
LusterSubmetallic to resinous
StreakGray to black
CleavageOne direction
FractureFlexible
Occurrence
Found in supergene copper deposits. Distinctive blue color. Copper ore.