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Austinite
Austinite

Neptunite
Neptunite



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Austinite
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Neptunite

Austinite and Neptunite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Easily soluble in cold dilute HCl
-

Durability

-
-

Specific Gravity

4.123.19-3.23
1 7.18
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Fracture

Uneven
Conchoidal

Cleavage

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

Mohs Hardness

4-4.55-6
2 10
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Chemical Composition

CaZn(AsO4)(OH)
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Neptunite Chemical Formula

While comparing Austinite and Neptunite 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 Neptunite chemical formula.

  • Chemical formula of Austinite- CaZn(AsO4)(OH)
  • Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Neptunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Neptunite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 3.19-3.23 whereas that of Neptunite is 3.19-3.23.