Diopside and Iolite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.22-3.40
  
2.6-2.7
  
Fracture
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
  
Not Available
  
Cleavage
Distinct/good on {110}
  
3,1
  
Mohs Hardness
5-6
  
7-7.5
  
Chemical Composition
CaMgSi2O6
  
Mg2Al4Si5O18
  
Diopside and Iolite Chemical Formula
While comparing Diopside 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 Diopside and Iolite chemical formula.
- Chemical formula of Diopside- CaMgSi2O6
- Chemical formula of Iolite- Mg2Al4Si5O18
Diopside and Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Diopside and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Diopside and Iolite Optical Properties during the identification of gemstone. Specific gravity of Diopside is 2.6-2.7 whereas that of Iolite is 2.6-2.7.