Watkinsonite

General Information:
 Chemical Formula:
PbCu2Bi4(Se,S)8
 Composition:
(Molecular Weight = 1,731.55 gm)
Copper 7.34 % Cu
Bismuth 48.28 % Bi
Lead 11.97 % Pb
Selenium 29.64 % Se
Sulfur 2.78 % S 
 Empirical Formula:
PbCu2Bi4Se6.5S1.5
 IMA Status:
Approved IMA
 Locality:
Otish Mountains uranium deposit, PQ, Canada.
 Name Origin:
Named for David H. Watkinson (1937-), Canadian mineralogist.
Physical Properties:
 Cleavage:
None
 Color:
black.
 Diaphaniety:
Opaque
 Habits:
Anhedral Grains - Granular minerals without the expression of crystal shapes, ,
 Hardness:
3.5 - Copper Penny
 Luster:
Metallic
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