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