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Dravite
Dravite

Biotite
Biotite



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Dravite
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Biotite

Dravite and Biotite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.03-3.182.7-3.3
1 7.18
👆🏻

Fracture

Uneven, Irregular, Conchoidal
Uneven, Even

Cleavage

{???} Indistinct
Perfect on the {001}

Mohs Hardness

7-7.52.5-3.0
2 10
👆🏻

Chemical Composition

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
K(Mg,Fe++)3[AlSi3O10(OH,F)2

Dravite and Biotite Chemical Formula

While comparing Dravite and Biotite 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 Dravite and Biotite chemical formula.

  • Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
  • Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

Dravite and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Biotite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.7-3.3 whereas that of Biotite is 2.7-3.3.