General Information:
Chemical Formula:
Pb19(Sb,As)20S49
IMA Status:
Approved IMA 1967
Physical Properties:
Cleavage:
[001] Perfect
Color:
lead gray or black.
Density:
5.52
Diaphaniety:
Opaque
Hardness:
3.5-4 - Copper Penny-Flourite
Luster:
Metallic
Streak:
metallic
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