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Biotite
Biotite

Dumortierite
Dumortierite



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Biotite
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Dumortierite

Biotite and Dumortierite 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
 
-
-
-
3.26-3.41
Fibrous, ConchoidalWalter Schumann
Distinct on {100}, poor on {110}; parting on {001}
7-8.5
AlAl6O3BSi3O18

Biotite and Dumortierite Chemical Formula

While comparing Biotite and Dumortierite 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 Dumortierite chemical formula.

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Biotite and Dumortierite Specific Gravity

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