Iolite and Sunstone Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.6-2.7
  
2.62-2.65
  
Fracture
Not Available
  
Gemstones of the world (2001)
  
Cleavage
3,1
  
001
  
Mohs Hardness
7-7.5
  
6
  
Chemical Composition
Mg2Al4Si5O18
  
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
  
Iolite and Sunstone Chemical Formula
While comparing Iolite and Sunstone 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 Sunstone chemical formula.
- Chemical formula of Iolite- Mg2Al4Si5O18
- Chemical formula of Sunstone- Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
Iolite and Sunstone Specific Gravity
Another important criteria for qualitative analysis of gemstones is Iolite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.