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Biotite
Biotite

Apophyllite
Apophyllite



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Biotite
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Apophyllite

Biotite and Apophyllite 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
 
-
-
-
2.30-2.50
Uneven
Perfect on (001)
4.5-5
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Biotite and Apophyllite Chemical Formula

While comparing Biotite and Apophyllite 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 Apophyllite chemical formula.

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Biotite and Apophyllite Specific Gravity

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