Sardonyx and Biotite Physical Properties

Sardonyx

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

2.55-2.702.7-3.3

1 7.18

1.5 Fracture

Not Available

Uneven, Even, Yellow, White

1.6 Cleavage

Not Available

Perfect on the {001}

1.7 Mohs Hardness

6.5-72.5-3.0

2 10

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Sardonyx and Biotite Chemical Formula

While comparing Sardonyx 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 Sardonyx and Biotite chemical formula.

Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

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Sardonyx and Biotite Specific Gravity

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