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Sapphire
Sapphire

Biotite
Biotite



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Sapphire
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Biotite

Sapphire and Biotite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
insoluble
-
3.95-4.03
Uneven
None, but may exhibit parting
9
Al 2 O 3
 
Brittle
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2

Sapphire and Biotite Chemical Formula

While comparing Sapphire 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 Sapphire and Biotite chemical formula.

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Sapphire and Biotite Specific Gravity

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