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Austinite
Austinite

Gypsum
Gypsum



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Austinite
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Gypsum

Austinite and Gypsum Physical Properties

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Physical Properties

Tenacity

Brittle
Flexible

Solubility

Easily soluble in cold dilute HCl
Soluble

Durability

-
-

Specific Gravity

4.122.20-2.40
1 7.18
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Fracture

Uneven
Conchoidal, Splintery, Fibrous

Cleavage

Good in two directions parallel to the prism faces {110}
Perfect on {010}, distinct on {100}

Mohs Hardness

4-4.52
2 10
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Chemical Composition

CaZn(AsO4)(OH)
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Austinite and Gypsum Chemical Formula

While comparing Austinite and Gypsum 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 Gypsum chemical formula.

  • Chemical formula of Austinite- CaZn(AsO4)(OH)
  • Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Austinite and Gypsum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Austinite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.