Dumortierite and Austinite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Easily soluble in cold dilute HCl
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
4.12
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Brittle, Uneven, Brittle, Uneven
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Good in two directions parallel to the prism faces {110}
Mohs Hardness
7-8.5
4-4.5
Chemical Composition
AlAl6O3BSi3O18
CaZn(AsO4)(OH)
Dumortierite and Austinite Chemical Formula
While comparing Dumortierite 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 Dumortierite and Austinite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Austinite- CaZn(AsO4)(OH)
Dumortierite and Austinite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 4.12 whereas that of Austinite is 4.12.