Pearl and Sapphire Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.60-2.85
  
3.95-4.03
  
Fracture
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
  
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Cleavage
none
  
None, but may exhibit parting
  
Mohs Hardness
2.5-4.5
  
9
  
Chemical Composition
Not Available
  
Al 2 O 3
  
Pearl and Sapphire Chemical Formula
While comparing Pearl 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 Pearl and Sapphire chemical formula.
>- Chemical formula of Sapphire- Al 2 O 3
Pearl and Sapphire Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pearl and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pearl and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Pearl is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.