Parapierrotite

General Information:
 Chemical Formula:
Tl(Sb,As)5S8
 IMA Status:
Approved IMA 1975
Physical Properties:
 Cleavage:
None
 Color:
black.
 Density:
5.04
 Diaphaniety:
Opaque
 Hardness:
2.5-3 - Finger Nail-Calcite
 Luster:
Sub Metallic
 Streak:
gray
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