Black Opal and Xonotlite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
2.71-2.72
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Handbook of mineralogy (2001), Difficult, Fibrous
Cleavage
Not Available
{???} Good
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Black Opal and Xonotlite Chemical Formula
While comparing Black Opal and Xonotlite 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 Black Opal and Xonotlite chemical formula.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Xonotlite- Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Black Opal and Xonotlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Black Opal and Xonotlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Xonotlite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 2.71-2.72 whereas that of Xonotlite is 2.71-2.72.