Star Sapphire and Glass Physical Properties
Tenacity
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Solubility
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Durability
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Not Available
  
Specific Gravity
3.90-4.05
  
2.39-4.00
  
Fracture
Not Available
  
ConchoidalGemdat.org, Management Team (2012), ConchoidalGemdat.org, Management Team (2012)
  
Cleavage
Not Available
  
Not Available
  
Mohs Hardness
Not Available
  
4-6
  
Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
  
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Star Sapphire and Glass Chemical Formula
While comparing Star Sapphire and Glass 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 Star Sapphire and Glass chemical formula.
- Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
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Star Sapphire and Glass Specific Gravity
Another important criteria for qualitative analysis of gemstones is Star Sapphire and Glass Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Glass Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 2.39-4.00 whereas that of Glass is 2.39-4.00.