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