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Biotite and Feldspar Physical Properties


Feldspar and Biotite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.7-3.3   
2.56-2.75   

Fracture
Uneven, Even, Yellow, White   
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)   

Cleavage
Perfect on the {001}   
two or three   

Mohs Hardness
2.5-3.0   
6-6.5   

Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2   
Not Available   

Optical Properties >>
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Biotite and Feldspar Chemical Formula

While comparing Biotite and Feldspar 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 Feldspar chemical formula.

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Biotite and Feldspar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Feldspar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Feldspar Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.56-2.75 whereas that of Feldspar is 2.56-2.75.

Yellow Gemstones

Yellow Gemstones


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