Biotite and Azurite Physical Properties

Biotite

Azurite

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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

2.7-3.33.70-3.90

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Perfect on the {001}

Perfect on {011}, fair on {100}, poor on {110}

1.7 Mohs Hardness

2.5-3.03.5-4

2 10

1.8 Chemical Composition

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

Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Azurite Chemical Formula

While comparing Biotite and Azurite 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 Azurite chemical formula.

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

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Biotite and Azurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Azurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Azurite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.70-3.90 whereas that of Azurite is 3.70-3.90.