Sapphire and Apatite Physical Properties

Sapphire

Apatite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.033.16-3.23

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

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

1.6 Cleavage

None, but may exhibit parting

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Sapphire and Apatite Chemical Formula

While comparing Sapphire 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 Sapphire and Apatite chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
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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Sapphire and Apatite Specific Gravity

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