Biotite and Andradite Garnet Physical Properties

Biotite

Andradite Garnet

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.33.8-3.9

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Not Available

1.6 Cleavage

Perfect on the {001}

None

1.7 Mohs Hardness

2.5-3.06.5-7.5

2 10

1.8 Chemical Composition

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

Ca₃Fe³⁺₂Si₃O₁₂

Biotite and Andradite Garnet Chemical Formula

While comparing Biotite and Andradite Garnet 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 Biotite and Andradite Garnet chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂

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Biotite and Andradite Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Andradite Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Andradite Garnet Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.8-3.9 whereas that of Andradite Garnet is 3.8-3.9.