Hemimorphite and Austinite Physical Properties

Hemimorphite

Austinite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Easily soluble in cold dilute HCl

Durability

Specific Gravity

3.30-3.504.12

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann, Conchoidal

Uneven

Cleavage

Perfect on {110}, poor on {101}, {001} rare

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

Mohs Hardness

54-4.5

2 10

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Chemical Composition

Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaZn(AsO4)(OH)

Hemimorphite and Austinite Chemical Formula

While comparing Hemimorphite 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 Hemimorphite and Austinite chemical formula.

Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Hemimorphite and Austinite Specific Gravity

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