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Spinel
Spinel

Austinite
Austinite



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Spinel
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Austinite

Spinel and Austinite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

3.64-3.664.12
1 7.18
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Fracture

Conchoidal, Uneven
Uneven

Cleavage

None, but may exhibit slight parting
Good in two directions parallel to the prism faces {110}

Mohs Hardness

84-4.5
2 10
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Chemical Composition

MgAl2O4
CaZn(AsO4)(OH)

Spinel and Austinite Chemical Formula

While comparing Spinel 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 Spinel and Austinite chemical formula.

  • Chemical formula of Spinel- MgAl2O4
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Spinel and Austinite Specific Gravity

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