Eskebornite

General Information:
 Chemical Formula:
CuFeSe2
 Composition:
(Molecular Weight = 277.31 gm)
Iron 20.14 % Fe
Copper 22.91 % Cu
Selenium 56.95 % Se
 Empirical Formula:
CuFe2+Se2
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
bronze.
 Diaphaniety:
Opaque
 Hardness:
3 - Calcite
 Luster:
Metallic
 Streak:
black
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