Blue John and Jade Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.00-3.25
2.90-3.38
Fracture
Not Available
Gemstones of the world (2001), Difficult, Splintery
Cleavage
Not Available
1 or 2,2 prismatic.
Mohs Hardness
Not Available
6-7
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 Jadeite: NaAlSi2O6
Blue John and Jade Chemical Formula
While comparing Blue John and Jade 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 Jade chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Jade- Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 Jadeite: NaAlSi2O6
Blue John and Jade Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Jade Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Jade Optical Properties during the identification of gemstone. Specific gravity of Blue John is 2.90-3.38 whereas that of Jade is 2.90-3.38.