Biotite and Dioptase Physical Properties

Biotite

Dioptase

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.33.25-3.35

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

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

1.6 Cleavage

Perfect on the {001}

Perfect in three directions

1.7 Mohs Hardness

2.5-3.05

2 10

1.8 Chemical Composition

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

CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Dioptase Chemical Formula

While comparing Biotite and Dioptase 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 Dioptase chemical formula.

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

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Biotite and Dioptase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.