Austinite and Boulder 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
1.98-2.25
Fracture
Brittle, Uneven, Brittle, Uneven
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Good in two directions parallel to the prism faces {110}
Not Available
Mohs Hardness
4-4.5
5-6.5
Chemical Composition
CaZn(AsO4)(OH)
SiO 2 + H 2OUlrich Henn and Claudio C.
Austinite and Boulder Opal Chemical Formula
While comparing Austinite and Boulder 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 Boulder Opal chemical formula.
- Chemical formula of Austinite- CaZn(AsO4)(OH)
- Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Austinite and Boulder Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Austinite and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Austinite is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.