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Biotite and Edenite Physical Properties


Edenite and Biotite Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.7-3.3   
3.05-3.37   

Fracture
Uneven, Even, Yellow, White   
Conchoidal, Brittle, Conchoidal   

Cleavage
Perfect on the {001}   
Good on (110)   

Mohs Hardness
2.5-3.0   
5-6   

Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2   
NaCa2Mg5Si7AlO22(OH)2   

Optical Properties >>
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Biotite and Edenite Chemical Formula

While comparing Biotite and Edenite 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 Edenite chemical formula.

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Biotite and Edenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Edenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Edenite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.05-3.37 whereas that of Edenite is 3.05-3.37.

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Yellow Gemstones


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