Biotite and Rosasite Physical Properties

Biotite

Rosasite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Effervesces in cold

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.34-4.2

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Splintery

1.6 Cleavage

Perfect on the {001}

Perfect on {100} and {010}

1.7 Mohs Hardness

2.5-3.04

2 10

1.8 Chemical Composition

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

Not Available

Biotite and Rosasite Chemical Formula

While comparing Biotite and Rosasite 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 Rosasite chemical formula.

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

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Biotite and Rosasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Rosasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Rosasite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 4-4.2 whereas that of Rosasite is 4-4.2.