Baumhauerite-2a

General Information:
 Chemical Formula:
Pb3As4S9
 Composition:
(Molecular Weight = 1,209.88 gm)
Arsenic 24.77 % As
Lead 51.38 % Pb
Sulfur 23.85 % S 
 Empirical Formula:
Pb3As4S9
Physical Properties:
 Color:
steel gray.
 Diaphaniety:
Opaque
 Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., ,
 Hardness:
3 - Calcite
 Luster:
Metallic
 Streak:
reddish brown
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