Sapphire and Ettringite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Partially soluble in water
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
1.77
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Not Available
  
Cleavage
None, but may exhibit parting
  
Perfect on {10 1 0}
  
Mohs Hardness
9
  
2-2.5
  
Chemical Composition
Al 2 O 3
  
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Sapphire and Ettringite Chemical Formula
While comparing Sapphire and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Sapphire and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 1.77 whereas that of Ettringite is 1.77.
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