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Pyrope
Pyrope

Austinite
Austinite



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Pyrope
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Austinite

Pyrope and Austinite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

insoluble in water
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

3.62-3.874.12
1 7.18
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Fracture

Conchoidal
Uneven

Cleavage

None
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

Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
CaZn(AsO4)(OH)

Pyrope and Austinite Chemical Formula

While comparing Pyrope 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 Pyrope and Austinite chemical formula.

  • Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Pyrope and Austinite Specific Gravity

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