Magnesiochromite

General Information:
 Chemical Formula:
MgCr2O4
 Composition:
(Molecular Weight = 192.29 gm)
Magnesium 12.64 % Mg
Chromium 54.08 % Cr
Oxygen 33.28 % O 
 Empirical Formula:
MgCr2O4
Physical Properties:
 Cleavage:
None
 Color:
black.
 Density:
4.2
 Diaphaniety:
Opaque
 Hardness:
5.5 - Knife Blade
 Luster:
Metallic
 Streak:
dark gray
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