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Biotite
Biotite

Aragonite
Aragonite



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Biotite
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Aragonite

Biotite and Aragonite 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
 
Brittle
Dilute acid
-
2.93-2.96
Subconchoidal, Conchoidal
Distinct on {010}, imperfect {110} and {011}
3.5-4
CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Aragonite Chemical Formula

While comparing Biotite and Aragonite 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 Aragonite chemical formula.

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Biotite and Aragonite Specific Gravity

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