Sapphire and White Opal Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
1.98-2.50
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Conchoidal, Conchoidal, Gemstones of the world (2001)
  
Cleavage
None, but may exhibit parting
  
Not Available
  
Mohs Hardness
9
  
5.5-6.5
  
Chemical Composition
Al 2 O 3
  
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
  
Sapphire and White Opal Chemical Formula
While comparing Sapphire and White Opal 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 White Opal chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of White Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Sapphire and White Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and White Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and White Opal Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 1.98-2.50 whereas that of White Opal is 1.98-2.50.
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