Coral and Spinel Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.60-2.70
  
3.64-3.66
  
Fracture
Irregular, Irregular, Gemstones of the world (2001)
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Not Available
  
None, but may exhibit slight parting
  
Mohs Hardness
3-4
  
8
  
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
  
MgAl2O4
  
Coral and Spinel Chemical Formula
While comparing Coral 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 Coral and Spinel chemical formula.
- Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Spinel- MgAl2O4
Coral and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Coral and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Coral and Spinel Optical Properties during the identification of gemstone. Specific gravity of Coral is 3.64-3.66 whereas that of Spinel is 3.64-3.66.
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