Apatite and Fayalite Physical Properties

Apatite

Fayalite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

4.392

1.5 Fracture

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

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

{010} moderate, {100} imperfect

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

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

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

Apatite and Fayalite Chemical Formula

While comparing Apatite and Fayalite 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 Apatite and Fayalite chemical formula.

Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Apatite and Fayalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 4.392 whereas that of Fayalite is 4.392.