Hardystonite and Apatite Physical Properties

Hardystonite

Apatite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.396-3.4433.16-3.23

1 7.18

1.5 Fracture

Brittle, Metallic

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

1.6 Cleavage

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

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

3-45

2 10

1.8 Chemical Composition

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

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

Hardystonite and Apatite Chemical Formula

While comparing Hardystonite 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 Hardystonite and Apatite chemical formula.

Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
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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Hardystonite and Apatite Specific Gravity

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