Anhydrite and Austinite Physical Properties

Anhydrite

Austinite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.984.12

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

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

1.7 Mohs Hardness

3.54-4.5

2 10

1.8 Chemical Composition

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

CaZn(AsO4)(OH)

Anhydrite and Austinite Chemical Formula

While comparing Anhydrite 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 Anhydrite and Austinite chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Anhydrite and Austinite Specific Gravity

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