Fayalite and Apatite Physical Properties

Fayalite

Apatite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

4.392

Conchoidal

{010} moderate, {100} imperfect

6.5-7

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

3.16-3.23

Conchoidal, Uneven, Conchoidal to uneven

[0001] indistinct, [1010] indistinct

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

Fayalite and Apatite Chemical Formula

While comparing Fayalite 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 Fayalite and Apatite chemical formula.

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Fayalite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite Vs Apatite during the identification of gemstone. Specific gravity of Fayalite is whereas that of Apatite is .