Rossmanite and Iolite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3
  
2.6-2.7
  
Fracture
Brittle, Metallic
  
Not Available
  
Cleavage
None
  
3,1
  
Mohs Hardness
Not Available
  
7-7.5
  
Chemical Composition
◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
  
Mg2Al4Si5O18
  
Rossmanite and Iolite Chemical Formula
While comparing Rossmanite 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 Rossmanite and Iolite chemical formula.
- Chemical formula of Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
- Chemical formula of Iolite- Mg2Al4Si5O18
Rossmanite and Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rossmanite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rossmanite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Rossmanite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.