Sapphire and Chalcedony Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
2.55-2.70
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
  
Cleavage
None, but may exhibit parting
  
Absent
  
Mohs Hardness
9
  
6.5-7
  
Chemical Composition
Al 2 O 3
  
SiO2
  
Sapphire and Chalcedony Chemical Formula
While comparing Sapphire and Chalcedony 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 Chalcedony chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Chalcedony- SiO2
Sapphire and Chalcedony Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.
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