General Information:
Chemical Formula:
Pb22Cu+4(Sb,Bi)30S69
IMA Status:
Approved IMA 1968
Physical Properties:
Cleavage:
[010] Distinct
Color:
lead gray.
Density:
5.51
Diaphaniety:
Opaque
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Metallic
Streak:
black
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