Corundum and Sanidine Physical Properties
Tenacity
Brittle
Not Available
Solubility
insoluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
2.54-2.61
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, Uneven, Gems, Sixth Edition (2006)
Cleavage
None – parting in 3 directions
{001} Perfect, {010} Good
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Corundum and Sanidine Chemical Formula
While comparing Corundum and Sanidine 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 Sanidine chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Sanidine- KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Corundum and Sanidine Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Sanidine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Sanidine Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.54-2.61 whereas that of Sanidine is 2.54-2.61.