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Covellite
Covellite

Biotite
Biotite



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Covellite
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Biotite

Covellite and Biotite Physical Properties

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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
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2

Covellite and Biotite Chemical Formula

While comparing Covellite and Biotite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Covellite and Biotite chemical formula.

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Covellite and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Covellite and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite Vs Biotite during the identification of gemstone. Specific gravity of Covellite is whereas that of Biotite is .