Corundum and Bustamite Physical Properties
Tenacity
Brittle
Not Available
Solubility
insoluble
Partly soluble in HCl.
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
3.32-3.43
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
None – parting in 3 directions
{100} perfect; {110} and {1 1 0} good; {010} poor
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Bustamite Chemical Formula
While comparing Corundum and Bustamite 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 Bustamite chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Corundum and Bustamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.