Azurite and Biotite Physical Properties

Azurite

Biotite

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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

3.70-3.902.7-3.3

1 7.18

1.5 Fracture

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

Uneven, Even, Yellow, White

1.6 Cleavage

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

Perfect on the {001}

1.7 Mohs Hardness

3.5-42.5-3.0

2 10

1.8 Chemical Composition

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

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

Azurite and Biotite Chemical Formula

While comparing Azurite and Biotite 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 Azurite and Biotite chemical formula.

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

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Azurite and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Azurite and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Azurite and Biotite Optical Properties during the identification of gemstone. Specific gravity of Azurite is 2.7-3.3 whereas that of Biotite is 2.7-3.3.