Blue John and Fayalite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.00-3.25
4.392
Fracture
Not Available
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Not Available
{010} moderate, {100} imperfect
Mohs Hardness
Not Available
6.5-7
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Blue John and Fayalite Chemical Formula
While comparing Blue John and Fayalite 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 Fayalite chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Blue John and Fayalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 4.392 whereas that of Fayalite is 4.392.