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Tourmaline
Tourmaline

Austinite
Austinite



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Tourmaline
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Austinite

Tourmaline and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

2.85-3.354.12
1 7.18
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Fracture

Uneven, Conchoidal
Uneven

Cleavage

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

Mohs Hardness

7-7.54-4.5
2 10
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Chemical Composition

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
CaZn(AsO4)(OH)

Tourmaline and Austinite Chemical Formula

While comparing Tourmaline 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 Tourmaline and Austinite chemical formula.

  • Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Tourmaline and Austinite Specific Gravity

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