Garavellite

General Information:
 Chemical Formula:
FeSbBiS4
 Composition:
(Molecular Weight = 514.84 gm)
Iron 10.85 % Fe
Bismuth 40.59 % Bi
Antimony 23.65 % Sb
Sulfur 24.91 % S 
 Empirical Formula:
Fe2+SbBiS4
 IMA Status:
Approved IMA 1979
Physical Properties:
 Color:
gray.
 Density:
5.64
 Diaphaniety:
Opaque
 Hardness:
4 - Fluorite
 Luster:
Metallic
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