Biotite and Danburite Physical Properties

Biotite

Danburite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.32.97-3.03

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

Perfect on the {001}

{001} Poor

1.7 Mohs Hardness

2.5-3.07

2 10

1.8 Chemical Composition

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

CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Danburite Chemical Formula

While comparing Biotite and Danburite 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 Danburite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Danburite- CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Biotite and Danburite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Danburite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Danburite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.97-3.03 whereas that of Danburite is 2.97-3.03.