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Biotite
Biotite

Milarite
Milarite



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Biotite
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Milarite

Biotite and Milarite 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
 
-
-
-
2.52-2.60
Uneven, Conchoidal
{0001} Imperfect, {1120} Imperfect
5.5-6
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Milarite Chemical Formula

While comparing Biotite and Milarite 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 Milarite chemical formula.

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Biotite and Milarite Specific Gravity

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