Crocoite and Biotite Physical Properties

Crocoite

Biotite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.90-6.102.7-3.3

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

Uneven, Even, Yellow, White

1.6 Cleavage

{110} Distinct, {001} Indistinct, {100} Indistinct

Perfect on the {001}

1.7 Mohs Hardness

2.5-32.5-3.0

2 10

1.8 Chemical Composition

PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Crocoite and Biotite Chemical Formula

While comparing Crocoite 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 Crocoite and Biotite chemical formula.

Chemical formula of Crocoite- PbCrO 4Michael 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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Crocoite and Biotite Specific Gravity

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