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