Biotite and Fuchsite Physical Properties

Biotite

Fuchsite

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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

2.7-3.32.77-2.88

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Uneven

1.6 Cleavage

Perfect on the {001}

Perfect basal

1.7 Mohs Hardness

2.5-3.02.5

2 10

1.8 Chemical Composition

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

K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)

Biotite and Fuchsite Chemical Formula

While comparing Biotite and Fuchsite 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 Fuchsite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Fuchsite- K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)

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Biotite and Fuchsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Fuchsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Fuchsite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.77-2.88 whereas that of Fuchsite is 2.77-2.88.