Cassiterite and Biotite Physical Properties

Cassiterite

Biotite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble

Durability

Specific Gravity

6.86-7.032.7-3.3

1 7.18

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Fracture

Subconchoidal, Uneven, Conchoidal, Irregular

Uneven, Even

Cleavage

{100} imperfect, {110} indistinct; partings on {111} or {011}

Perfect on the {001}

Mohs Hardness

6-72.5-3.0

2 10

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Chemical Composition

SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

K(Mg,Fe++)3[AlSi3O10(OH,F)2

Cassiterite and Biotite Chemical Formula

While comparing Cassiterite 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 Cassiterite and Biotite chemical formula.

Chemical formula of Cassiterite- SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

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Cassiterite and Biotite Specific Gravity

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