Sapphire and Lazurite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
insoluble
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
2.75
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
None, but may exhibit parting
  
Imperfect on {110}
  
Mohs Hardness
9
  
5.5
  
Chemical Composition
Al 2 O 3
  
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
  
Sapphire and Lazurite Chemical Formula
While comparing Sapphire and Lazurite 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 Lazurite chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Sapphire and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.75 whereas that of Lazurite is 2.75.
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