Blue John and Gahnospinel Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.00-3.25
3.65-4.55
Fracture
Not Available
ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
None, but may exhibit slight parting
Mohs Hardness
Not Available
7.5-8
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Blue John and Gahnospinel Chemical Formula
While comparing Blue John and Gahnospinel 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 Blue John and Gahnospinel chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Blue John and Gahnospinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Blue John is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.