Apatite and Austinite Physical Properties

Apatite

Austinite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.16-3.23

Conchoidal, Uneven, Conchoidal to uneven

[0001] indistinct, [1010] indistinct

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

Brittle

Easily soluble in cold dilute HCl

4.12

Uneven

Good in two directions parallel to the prism faces {110}

4-4.5

CaZn(AsO4)(OH)

Apatite and Austinite Chemical Formula

While comparing Apatite and Austinite 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 Austinite chemical formula.

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Apatite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite Vs Austinite during the identification of gemstone. Specific gravity of Apatite is whereas that of Austinite is .