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Biotite and Sapphire Physical Properties


Sapphire and Biotite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
2.7-3.3   
3.95-4.03   

Fracture
Uneven, Even, Yellow, White   
Uneven, Uneven, Gems, Sixth Edition (2006)   

Cleavage
Perfect on the {001}   
None, but may exhibit parting   

Mohs Hardness
2.5-3.0   
9   

Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2   
Al 2 O 3   

Optical Properties >>
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Biotite and Sapphire Chemical Formula

While comparing Biotite and Sapphire 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 Sapphire chemical formula.

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Biotite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.

Yellow Gemstones

Yellow Gemstones


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