Rutile and Opal Physical Properties
Tenacity
Not Available
BrittleWalter Schumann
Solubility
Insoluble in acids
hot salt water
Durability
Not Available
Not Available
Specific Gravity
4.20-4.30
1.98-2.25
Fracture
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
None
Mohs Hardness
6-6.5
5-6.5
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO2 · nH2O
Rutile and Opal Chemical Formula
While comparing Rutile and 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 Opal chemical formula.
- Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Opal- SiO2 · nH2O
Rutile and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rutile and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rutile and Opal Optical Properties during the identification of gemstone. Specific gravity of Rutile is 1.98-2.25 whereas that of Opal is 1.98-2.25.