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Biotite
Biotite

Pyrope
Pyrope



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Biotite
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Pyrope

Biotite and Pyrope Physical Properties

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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
 
-
insoluble in water
-
3.62-3.87
Conchoidal
None
7-7.5
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Biotite and Pyrope Chemical Formula

While comparing Biotite and Pyrope 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 Pyrope chemical formula.

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Biotite and Pyrope Specific Gravity

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