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Kyanite
Kyanite

Austinite
Austinite



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Kyanite
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Austinite

Kyanite and Austinite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

3.53-3.654.12
1 7.18
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Fracture

Splintery
Uneven

Cleavage

[100] perfect [010] imperfect with 79° angle between
Good in two directions parallel to the prism faces {110}

Mohs Hardness

4-74-4.5
2 10
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Chemical Composition

Al2SiO5
CaZn(AsO4)(OH)

Kyanite and Austinite Chemical Formula

While comparing Kyanite 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 Kyanite and Austinite chemical formula.

  • Chemical formula of Kyanite- Al2SiO5
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Kyanite and Austinite Specific Gravity

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