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