Apatite and Sapphire Physical Properties

Apatite

Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.233.95-4.03

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

[0001] indistinct, [1010] indistinct

None, but may exhibit parting

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

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

Al ₂ O ₃

Apatite and Sapphire Chemical Formula

While comparing Apatite and Sapphire 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 Sapphire 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 Sapphire- Al ₂ O ₃

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Apatite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.