Bustamite and Polyhalite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Partly soluble in HCl.
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.32-3.43
2.78
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Brittle
Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Perfect on {10 1 }; parting on {010}
Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Not Available
Bustamite and Polyhalite Chemical Formula
While comparing Bustamite and Polyhalite 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 Polyhalite chemical formula.
- Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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Bustamite and Polyhalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Bustamite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 2.78 whereas that of Polyhalite is 2.78.