Biotite and Cobaltite Physical Properties

Biotite

Cobaltite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.36.3

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

1.6 Cleavage

Perfect on the {001}

{100} Good, {010} Good, {001} Good

1.7 Mohs Hardness

2.5-3.05.5

2 10

1.8 Chemical Composition

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

CoAsSAnthony et al , Handbook of mineralogy (2001)

Biotite and Cobaltite Chemical Formula

While comparing Biotite and Cobaltite 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 Cobaltite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

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Biotite and Cobaltite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Cobaltite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Cobaltite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 6.3 whereas that of Cobaltite is 6.3.