Apatite and Benitoite Physical Properties

Apatite

Benitoite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Insoluble: HCl

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

3.61-3.68

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

[10 1 1] poor

1.7 Mohs Hardness

6-6.5

1.8 Chemical Composition

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

BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Apatite and Benitoite Chemical Formula

While comparing Apatite and Benitoite 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 Benitoite 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 Benitoite- BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Apatite and Benitoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Benitoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Benitoite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.61-3.68 whereas that of Benitoite is 3.61-3.68.