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Grossular
Grossular

Austinite
Austinite



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Grossular
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Austinite

Grossular and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

3.55-3.734.12
1 7.18
👆🏻

Fracture

Conchoidal, Uneven
Uneven

Cleavage

none
Good in two directions parallel to the prism faces {110}

Mohs Hardness

7-7.54-4.5
2 10
👆🏻

Chemical Composition

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

Grossular and Austinite Chemical Formula

While comparing Grossular 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 Grossular and Austinite chemical formula.

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

Grossular and Austinite Specific Gravity

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