Apatite and Forsterite Physical Properties

Apatite

Forsterite

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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

3.23-3.26

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

Perfect on {010} imperfect on {100}

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

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

Apatite and Forsterite Chemical Formula

While comparing Apatite and Forsterite 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 Forsterite 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 Forsterite- Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Apatite and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.