Diopside and Sapphire Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.22-3.40
  
3.95-4.03
  
Fracture
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
  
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Cleavage
Distinct/good on {110}
  
None, but may exhibit parting
  
Mohs Hardness
5-6
  
9
  
Chemical Composition
CaMgSi2O6
  
Al 2 O 3
  
Diopside and Sapphire Chemical Formula
While comparing Diopside and Sapphire 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 Sapphire chemical formula.
- Chemical formula of Diopside- CaMgSi2O6
- Chemical formula of Sapphire- Al 2 O 3
Diopside and Sapphire Specific Gravity
Another important criteria for qualitative analysis of gemstones is Diopside and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Diopside and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Diopside is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.