Eskolaite

General Information:
 Chemical Formula:
Cr2O3
 Composition:
(Molecular Weight = 151.99 gm)
Chromium 68.42 % Cr
Oxygen 31.58 % O 
 Empirical Formula:
Cr2O3
Physical Properties:
 Cleavage:
None
 Color:
black.
 Density:
5.18
 Diaphaniety:
Opaque
 Hardness:
8-8.5
 Luster:
Metallic
 Streak:
green
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