Charlesite and Spinel Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.79
  
3.64-3.66
  
Fracture
Irregular/uneven, Brittle, Metallic
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Perfect on {10bar10}
  
None, but may exhibit slight parting
  
Mohs Hardness
2.5
  
8
  
Chemical Composition
Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
  
MgAl2O4
  
Charlesite and Spinel Chemical Formula
While comparing Charlesite 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 Charlesite and Spinel chemical formula.
- Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
- Chemical formula of Spinel- MgAl2O4
Charlesite and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Charlesite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Charlesite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Charlesite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.