Apatite and Variscite Physical Properties

Apatite

Variscite

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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

3.16-3.232.42-2.58

1 7.18

1.5 Fracture

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

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

[010] perfect

1.7 Mohs Hardness

54-5

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

AlPO₄ · 2(H₂O)

Apatite and Variscite Chemical Formula

While comparing Apatite and Variscite 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 Variscite 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 Variscite- AlPO₄ · 2(H₂O)

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Apatite and Variscite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Variscite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Variscite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.42-2.58 whereas that of Variscite is 2.42-2.58.