General Information:
Chemical Formula:Cu9S5
Composition:(Molecular Weight = 732.24 gm)Copper 78.10 %
CuSulfur 21.90 %
S Empirical Formula: Cu9S5
IMA Status:Approved IMA 1960
Physical Properties: Cleavage:[???] Indistinct
Color:blue, dark blue, or black.
Density:5.6
Diaphaniety:Opaque
Hardness:2.5-3 - Finger Nail-Calcite
Luster:Sub Metallic
Streak:grayish black
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