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Sugilite
Sugilite

Austinite
Austinite



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Sugilite
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Austinite

Sugilite and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

2.69-2.794.12
1 7.18
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Fracture

Conchoidal
Uneven

Cleavage

Poor on {0001}
Good in two directions parallel to the prism faces {110}

Mohs Hardness

5.5-6.54-4.5
2 10
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Chemical Composition

KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
CaZn(AsO4)(OH)

Sugilite and Austinite Chemical Formula

While comparing Sugilite 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 Sugilite and Austinite chemical formula.

  • Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Sugilite and Austinite Specific Gravity

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