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Covellite
Covellite

Chromite
Chromite



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Covellite
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Chromite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Flexible
-
-
4.6-4.76
-
Perfect on {0001}
-9999
CuSMichael O’Donoghue , Gems, Sixth edition (2006) More from other references
 
Brittle
-
-
4.5-4.8
Uneven
None, parting may develop along {111}
5.5
Fe++Cr2O4