Hauyne and Blue John Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Gelatinises in acids
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.4-2.5
  
3.00-3.25
  
Fracture
Uneven, Conchoidal, Brittle
  
Not Available
  
Cleavage
Distinct on {110}
  
Not Available
  
Mohs Hardness
5-6
  
Not Available
  
Chemical Composition
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
  
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Hauyne and Blue John Chemical Formula
While comparing Hauyne 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 Hauyne and Blue John chemical formula.
- Chemical formula of Hauyne- (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Hauyne and Blue John Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hauyne and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hauyne and Blue John Optical Properties during the identification of gemstone. Specific gravity of Hauyne is 3.00-3.25 whereas that of Blue John is 3.00-3.25.