Kashmir sapphire and Norbergite Physical Properties
Tenacity
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Not Available
  
Solubility
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Not Available
  
Durability
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Not Available
  
Specific Gravity
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3.177
  
Fracture
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Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Cleavage
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{???} Distinct
  
Mohs Hardness
Not Available
  
6-6.5
  
Chemical Composition
Not Available
  
Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)
  
Kashmir sapphire and Norbergite Chemical Formula
While comparing Kashmir sapphire and Norbergite 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 Kashmir sapphire and Norbergite chemical formula.
>- Chemical formula of Norbergite- Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)
Kashmir sapphire and Norbergite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kashmir sapphire and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kashmir sapphire and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Kashmir sapphire is 3.177 whereas that of Norbergite is 3.177.