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Austinite
Austinite

Adamite
Adamite



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Austinite
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Adamite

Austinite and Adamite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

Easily soluble in cold dilute HCl
-

Durability

-
-

Specific Gravity

4.124.32-4.48
1 7.18
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Fracture

Uneven
Uneven, Subconchoidal, Conchoidal

Cleavage

Good in two directions parallel to the prism faces {110}
{101}, good; {010}, poor

Mohs Hardness

4-4.53.5
2 10
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Chemical Composition

CaZn(AsO4)(OH)
Zn 2(AsO 4)(OH)Michael O’Donoghue , Gems, Sixth edition (2006)

Austinite and Adamite Chemical Formula

While comparing Austinite and Adamite 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 Adamite chemical formula.

  • Chemical formula of Austinite- CaZn(AsO4)(OH)
  • Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael O’Donoghue , Gems, Sixth edition (2006)

Austinite and Adamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Adamite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 4.32-4.48 whereas that of Adamite is 4.32-4.48.