Star Ruby and Opal Physical Properties
Tenacity
Not Available
BrittleWalter Schumann
Solubility
Not Available
hot salt water
Durability
Not Available
Not Available
Specific Gravity
3.95-4.10
1.98-2.25
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Cleavage
Not Available
None
Mohs Hardness
Not Available
5-6.5
Chemical Composition
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO2 · nH2O
Star Ruby and Opal Chemical Formula
While comparing Star Ruby 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 Star Ruby and Opal chemical formula.
- Chemical formula of Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Opal- SiO2 · nH2O
Star Ruby and Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Star Ruby and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Ruby and Opal Optical Properties during the identification of gemstone. Specific gravity of Star Ruby is 1.98-2.25 whereas that of Opal is 1.98-2.25.