Star Ruby and Corundum Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.95-4.10
3.90-4.05
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Uneven, Uneven, Gems, Difficult, Fibrous
Cleavage
Not Available
None – parting in 3 directions
Mohs Hardness
Not Available
9
Chemical Composition
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2O 3Arthur Thomas , Gemstones (2009)
Star Ruby and Corundum Chemical Formula
While comparing Star Ruby and Corundum 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 Corundum chemical formula.
- Chemical formula of Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Star Ruby and Corundum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Star Ruby and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Ruby and Corundum Optical Properties during the identification of gemstone. Specific gravity of Star Ruby is 3.90-4.05 whereas that of Corundum is 3.90-4.05.