Peridot and Biotite Physical Properties

Peridot

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

1.54-1.552.7-3.3

1 7.18

1.5 Fracture

Conchoidal

Uneven, Even, Yellow, White

1.6 Cleavage

Poor

Perfect on the {001}

1.7 Mohs Hardness

6.5-72.5-3.0

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

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

Peridot and Biotite Chemical Formula

While comparing Peridot 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 Peridot and Biotite chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

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Peridot and Biotite Specific Gravity

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