Sunstone and Biotite Physical Properties

Sunstone

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

2.62-2.652.7-3.3

1 7.18

1.5 Fracture

Gemstones of the world (2001)

Uneven, Even, Yellow, White

1.6 Cleavage

001

Perfect on the {001}

1.7 Mohs Hardness

62.5-3.0

2 10

1.8 Chemical Composition

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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

Sunstone and Biotite Chemical Formula

While comparing Sunstone 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 Sunstone and Biotite chemical formula.

Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈
Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

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Sunstone and Biotite Specific Gravity

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