Hibonite and Blue John Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.84
  
3.00-3.25
  
Fracture
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Not Available
  
Cleavage
{0001} good, {10 1 0} parting
  
Not Available
  
Mohs Hardness
7.5-8
  
Not Available
  
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
  
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Hibonite and Blue John Chemical Formula
While comparing Hibonite 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 Hibonite and Blue John chemical formula.
- Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Hibonite and Blue John Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hibonite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hibonite and Blue John Optical Properties during the identification of gemstone. Specific gravity of Hibonite is 3.00-3.25 whereas that of Blue John is 3.00-3.25.