Black Opal and Rutile Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Insoluble in acids
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
4.20-4.30
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
{110} good, 100 moderate, parting on {092} and {011}
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Black Opal and Rutile Chemical Formula
While comparing Black Opal and Rutile 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 Rutile chemical formula.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Black Opal and Rutile Specific Gravity
Another important criteria for qualitative analysis of gemstones is Black Opal and Rutile Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Rutile Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 4.20-4.30 whereas that of Rutile is 4.20-4.30.