Gahnite and Austinite Physical Properties

Gahnite

Austinite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.624.12

1 7.18

1.5 Fracture

Conchoidal, Uneven

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Indistinct parting on [111]

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

1.7 Mohs Hardness

7.5-84-4.5

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

CaZn(AsO4)(OH)

Gahnite and Austinite Chemical Formula

While comparing Gahnite 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 Gahnite and Austinite chemical formula.

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

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Gahnite and Austinite Specific Gravity

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