Bustamite and Blue John Physical Properties
Tenacity
Not Available
Not Available
Solubility
Partly soluble in HCl.
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.32-3.43
3.00-3.25
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Not Available
Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Not Available
Mohs Hardness
5.5-6
Not Available
Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Bustamite and Blue John Chemical Formula
While comparing Bustamite and Blue John 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 Blue John chemical formula.
- Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Bustamite and Blue John Specific Gravity
Another important criteria for qualitative analysis of gemstones is Bustamite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Blue John Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 3.00-3.25 whereas that of Blue John is 3.00-3.25.