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Austinite
Austinite

Gahnite
Gahnite



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Austinite
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Gahnite

Austinite and Gahnite Physical Properties

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Physical Properties

Tenacity

Brittle
-

Solubility

Easily soluble in cold dilute HCl
-

Durability

-
-

Specific Gravity

4.124.00-4.62
1 7.18
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Fracture

Uneven
Conchoidal, Uneven

Cleavage

Good in two directions parallel to the prism faces {110}
Indistinct parting on [111]

Mohs Hardness

4-4.57.5-8
2 10
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Chemical Composition

CaZn(AsO4)(OH)
ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Gahnite Chemical Formula

While comparing Austinite and Gahnite 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 Austinite and Gahnite chemical formula.

  • Chemical formula of Austinite- CaZn(AsO4)(OH)
  • Chemical formula of Gahnite- ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.