Blue John and Fuchsite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.00-3.25
  
2.77-2.88
  
Fracture
Not Available
  
Uneven
  
Cleavage
Not Available
  
Perfect basal
  
Mohs Hardness
Not Available
  
2.5
  
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
  
Blue John and Fuchsite Chemical Formula
While comparing Blue John and Fuchsite 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 Fuchsite chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Fuchsite- K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
Blue John and Fuchsite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Fuchsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Fuchsite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 2.77-2.88 whereas that of Fuchsite is 2.77-2.88.