Iolite and Fayalite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.7
  
4.392
  
Fracture
Not Available
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Cleavage
3,1
  
{010} moderate, {100} imperfect
  
Mohs Hardness
7-7.5
  
6.5-7
  
Chemical Composition
Mg2Al4Si5O18
  
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Iolite and Fayalite Chemical Formula
While comparing Iolite and Fayalite 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 Iolite and Fayalite chemical formula.
- Chemical formula of Iolite- Mg2Al4Si5O18
- Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Iolite and Fayalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Iolite and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 4.392 whereas that of Fayalite is 4.392.