Sapphire and Williamsite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
2.51-2.63
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Conchoidal, Conchoidal, Handbook of mineralogy (2001)
  
Cleavage
None, but may exhibit parting
  
Not Available
  
Mohs Hardness
9
  
4
  
Chemical Composition
Al 2 O 3
  
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
  
Sapphire and Williamsite Chemical Formula
While comparing Sapphire and Williamsite 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 Sapphire and Williamsite chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
Sapphire and Williamsite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Williamsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Williamsite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.51-2.63 whereas that of Williamsite is 2.51-2.63.
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