Corundum and Rutile Physical Properties
Tenacity
Brittle
Not Available
Solubility
insoluble
Insoluble in acids
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
4.20-4.30
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
None – parting in 3 directions
{110} good, 100 moderate, parting on {092} and {011}
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Corundum and Rutile Chemical Formula
While comparing Corundum 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 Corundum and Rutile chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Corundum and Rutile Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Rutile Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Rutile Optical Properties during the identification of gemstone. Specific gravity of Corundum is 4.20-4.30 whereas that of Rutile is 4.20-4.30.