Brookite and Apatite Physical Properties

Brookite

Apatite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.87-4.143.16-3.23

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

Poor on {120}, in traces on {001}

[0001] indistinct, [1010] indistinct

Mohs Hardness

5.5-65

2 10

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Chemical Composition

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

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

Brookite and Apatite Chemical Formula

While comparing Brookite 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 Brookite and Apatite chemical formula.

Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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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Brookite and Apatite Specific Gravity

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