Aragonite and Biotite Physical Properties

Aragonite

Biotite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Dilute acid

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.93-2.962.7-3.3

1 7.18

1.5 Fracture

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

Uneven, Even, Yellow, White

1.6 Cleavage

Distinct on {010}, imperfect {110} and {011}

Perfect on the {001}

1.7 Mohs Hardness

3.5-42.5-3.0

2 10

1.8 Chemical Composition

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Aragonite and Biotite Chemical Formula

While comparing Aragonite 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 Aragonite and Biotite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael 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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Aragonite and Biotite Specific Gravity

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