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Iolite and Biotite Physical Properties


Biotite and Iolite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.6-2.7   
2.7-3.3   

Fracture
Not Available   
Uneven, Even, Yellow, White   

Cleavage
3,1   
Perfect on the {001}   

Mohs Hardness
7-7.5   
2.5-3.0   

Chemical Composition
Mg2Al4Si5O18   
K(Mg,Fe++)3[AlSi3O10(OH,F)2   

Optical Properties >>
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Iolite and Biotite Chemical Formula

While comparing Iolite 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 Iolite and Biotite chemical formula.

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Iolite and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Biotite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.7-3.3 whereas that of Biotite is 2.7-3.3.

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