Villamaninite

General Information:
 Chemical Formula:
(Cu,Ni,Co,Fe)S2
 Composition:
(Molecular Weight = 114.68 gm)
Iron 0.24 % Fe
Cobalt 0.77 % Co
Copper 27.71 % Cu
Nickel 15.35 % Ni
Sulfur 55.92 % S 
 Empirical Formula:
Cu0.5Ni0.3Co0.015Fe2+0.005S2
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
iron black.
 Density:
4.523
 Diaphaniety:
Opaque
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Metallic
 Streak:
black
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