Blue John and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.00-3.25
1.77
Fracture
Not Available
Not Available
Cleavage
Not Available
Perfect on {10 1 0}
Mohs Hardness
Not Available
2-2.5
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Blue John and Ettringite Chemical Formula
While comparing Blue John and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Blue John and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 1.77 whereas that of Ettringite is 1.77.