Biotite and Falcons Eye Physical Properties

Biotite

Falcons Eye

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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

2.7-3.32.58-2.64

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Gemstones of the world (2001)

1.6 Cleavage

Perfect on the {001}

Not Available

1.7 Mohs Hardness

2.5-3.07

2 10

1.8 Chemical Composition

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

SiO 2Walter Schumann , Gemstones of the world (2001)

Biotite and Falcons Eye Chemical Formula

While comparing Biotite and Falcons Eye 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 Falcons Eye chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Falcons Eye- SiO 2Walter Schumann , Gemstones of the world (2001)

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Biotite and Falcons Eye Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Falcons Eye Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Falcons Eye Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.58-2.64 whereas that of Falcons Eye is 2.58-2.64.