Rutile and Iolite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Insoluble in acids
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.20-4.30
  
2.6-2.7
  
Fracture
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Not Available
  
Cleavage
{110} good, 100 moderate, parting on {092} and {011}
  
3,1
  
Mohs Hardness
6-6.5
  
7-7.5
  
Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Mg2Al4Si5O18
  
Rutile and Iolite Chemical Formula
While comparing Rutile and Iolite 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 Rutile and Iolite chemical formula.
- Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Iolite- Mg2Al4Si5O18
Rutile and Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rutile and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rutile and Iolite Optical Properties during the identification of gemstone. Specific gravity of Rutile is 2.6-2.7 whereas that of Iolite is 2.6-2.7.