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