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Biotite
Biotite

Topazolite
Topazolite



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Biotite
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Topazolite

Biotite and Topazolite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2
 
-
-
-
3.70-4.10
Conchoidal
Indistinct
6.5-7
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Biotite and Topazolite Chemical Formula

While comparing Biotite and Topazolite 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 Topazolite chemical formula.

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Biotite and Topazolite Specific Gravity

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