Almandine and Austinite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Easily soluble in cold dilute HCl
Durability
Not Available
Not Available
Specific Gravity
3.95-4.30
4.12
Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
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
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
CaZn(AsO4)(OH)
Almandine and Austinite Chemical Formula
While comparing Almandine 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 Almandine and Austinite chemical formula.
- Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Austinite- CaZn(AsO4)(OH)
Almandine and Austinite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Almandine and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Austinite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 4.12 whereas that of Austinite is 4.12.