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Biotite
Biotite

Sanidine
Sanidine



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Biotite
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Sanidine

Biotite and Sanidine Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.7-3.32.54-2.61
Amber
1 7.18
1.5 Fracture
Uneven, Even, Yellow, White
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
Perfect on the {001}
{001} Perfect, {010} Good
1.7 Mohs Hardness
2.5-3.06
Amber
2 10
1.8 Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Biotite and Sanidine Chemical Formula

While comparing Biotite and Sanidine 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 Sanidine chemical formula.

  • Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
  • Chemical formula of Sanidine- KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Biotite and Sanidine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Sanidine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Sanidine Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.54-2.61 whereas that of Sanidine is 2.54-2.61.