Adularia and Biotite Physical Properties

Adularia

Biotite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.54-2.61

2.7-3.3

1.5 Fracture

Not Available

Uneven, Even, Yellow, White

1.6 Cleavage

Not Available

Perfect on the {001}

1.7 Mohs Hardness

2.5-3.0

1.8 Chemical Composition

KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Adularia and Biotite Chemical Formula

While comparing Adularia 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 Adularia and Biotite chemical formula.

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

Compare Gems Found in America

Adularia Vs Andalusite

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Adularia Vs Anglesite

Adularia and Biotite Specific Gravity

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