Pyrite and Austinite Physical Properties

Pyrite

Austinite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble in water

Easily soluble in cold dilute HCl

Durability

Specific Gravity

5.00-5.204.12

1 7.18

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Fracture

Uneven, Conchoidal, ConchoidalWalter Schumann

Uneven

Cleavage

Indistinct on {001}; partings on {011} and {111}

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

Mohs Hardness

6-6.54-4.5

2 10

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Chemical Composition

FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaZn(AsO4)(OH)

Pyrite and Austinite Chemical Formula

While comparing Pyrite 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 Pyrite and Austinite chemical formula.

Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Pyrite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Pyrite is 4.12 whereas that of Austinite is 4.12.