Apatite and Star Sapphire Physical Properties

Apatite

Star Sapphire

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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

3.16-3.233.90-4.05

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Not Available

1.7 Mohs Hardness

5Not Available

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 2O 3Ulrich Henn and Claudio C.

Apatite and Star Sapphire Chemical Formula

While comparing Apatite and Star 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 Star 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 Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

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Apatite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.