Grossular and Austinite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Easily soluble in cold dilute HCl
Durability
Not Available
Not Available
Specific Gravity
3.55-3.73
4.12
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Brittle, Uneven, Brittle, Uneven
Cleavage
none
Good in two directions parallel to the prism faces {110}
Mohs Hardness
7-7.5
4-4.5
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.