Sardonyx and Spinel Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.55-2.70
  
3.64-3.66
  
Fracture
Not Available
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Not Available
  
None, but may exhibit slight parting
  
Mohs Hardness
6.5-7
  
8
  
Chemical Composition
SiO 2Ulrich Henn and Claudio C.
  
MgAl2O4
  
Sardonyx and Spinel Chemical Formula
While comparing Sardonyx and Spinel 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 Sardonyx and Spinel chemical formula.
- Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
- Chemical formula of Spinel- MgAl2O4
Sardonyx and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sardonyx and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sardonyx and Spinel Optical Properties during the identification of gemstone. Specific gravity of Sardonyx is 3.64-3.66 whereas that of Spinel is 3.64-3.66.