Hastite

General Information:
 Chemical Formula:
CoSe2
 Composition:
(Molecular Weight = 216.85 gm)
Cobalt 27.18 % Co
Selenium 72.82 % Se
 Empirical Formula:
CoSe2
Physical Properties:
 Color:
brownish red or red violet.
 Density:
7.22
 Diaphaniety:
Opaque
 Hardness:
6 - Orthoclase
 Luster:
Metallic
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