Austinite and Fire Opal Physical Properties
Tenacity
Brittle
Not Available
Solubility
Easily soluble in cold dilute HCl
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.12
1.97-2.22
Fracture
Brittle, Uneven, Brittle, Uneven
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
Good in two directions parallel to the prism faces {110}
Not Available
Mohs Hardness
4-4.5
6-6.5
Chemical Composition
CaZn(AsO4)(OH)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Austinite and Fire Opal Chemical Formula
While comparing Austinite and Fire Opal 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 Austinite and Fire Opal chemical formula.
- Chemical formula of Austinite- CaZn(AsO4)(OH)
- Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Austinite and Fire Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Austinite and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Austinite is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.