Chromite and Apatite Physical Properties

Chromite

Apatite

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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

4.5-4.83.16-3.23

1 7.18

1.5 Fracture

Uneven

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

1.6 Cleavage

None, parting may develop along {111}

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

5.55

2 10

1.8 Chemical Composition

Fe++Cr2O4

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Chromite and Apatite Chemical Formula

While comparing Chromite and Apatite 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 Chromite and Apatite chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

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Chromite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Chromite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.