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Biotite
Biotite

Realgar
Realgar



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Biotite
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Realgar

Biotite and Realgar Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2
 
-
-
-
3.56
-
{010} Good
-9999
AsSMichael O’Donoghue , Gems, Sixth Edition (2006)

Biotite and Realgar Chemical Formula

While comparing Biotite and Realgar 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 Biotite and Realgar chemical formula.

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Biotite and Realgar Specific Gravity

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