Jalpaite

General Information:
 Chemical Formula:
Ag3CuS2
 Composition:
(Molecular Weight = 451.28 gm)
Copper 14.08 % Cu
Silver 71.71 % Ag
Sulfur 14.21 % S 
 Empirical Formula:
Ag3CuS2
Physical Properties:
 Color:
gray or dark gray.
 Density:
6.82
 Diaphaniety:
Opaque
 Hardness:
2-2.5 - Gypsum-Finger Nail
 Luster:
Metallic
 Streak:
black
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