Apatite and Hardystonite Physical Properties

Apatite

Hardystonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.233.396-3.443

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

[0001] indistinct, [1010] indistinct

[001] good, [100] and [110] fair

1.7 Mohs Hardness

53-4

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

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Apatite and Hardystonite Chemical Formula

While comparing Apatite and Hardystonite 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 Hardystonite 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 Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

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Apatite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.