Erythrite and Sapphire Physical Properties
Tenacity
Sectile
  
Not Available
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.06
  
3.95-4.03
  
Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
  
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
  
None, but may exhibit parting
  
Mohs Hardness
Not Available
  
9
  
Chemical Composition
Co3(AsO4)2•8(H2O)
  
Al 2 O 3
  
Erythrite and Sapphire Chemical Formula
While comparing Erythrite 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 Erythrite and Sapphire chemical formula.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
- Chemical formula of Sapphire- Al 2 O 3
Erythrite and Sapphire Specific Gravity
Another important criteria for qualitative analysis of gemstones is Erythrite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.