Biotite and Diaspore Physical Properties

Biotite

Diaspore

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1 Physical Properties

1.1 Tenacity

Brittle

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.33.30-3.40

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Perfect on the {001}

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

2.5-3.06.5-7

2 10

1.8 Chemical Composition

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

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Biotite and Diaspore Chemical Formula

While comparing Biotite and Diaspore 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 Diaspore chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Biotite and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.