Argentopyrite

General Information:
 Chemical Formula:
AgFe2S3
 Composition:
(Molecular Weight = 315.76 gm)
Iron 35.37 % Fe
Silver 34.16 % Ag
Sulfur 30.47 % S 
 Empirical Formula:
AgFe3+2S3
Physical Properties:
 Cleavage:
None
 Color:
blue, bronze brown, green, yellow, or white.
 Density:
4.25
 Diaphaniety:
Opaque
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luster:
Metallic
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