Diaspore and Spinel Physical Properties
Tenacity
Very brittle
  
Not Available
  
Solubility
insoluble
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.30-3.40
  
3.64-3.66
  
Fracture
Conchoidal, Brittle, Conchoidal
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
{010} perfect, {110} distinct, {100} in traces
  
None, but may exhibit slight parting
  
Mohs Hardness
6.5-7
  
8
  
Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
  
MgAl2O4
  
Diaspore and Spinel Chemical Formula
While comparing Diaspore 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 Diaspore and Spinel chemical formula.
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Spinel- MgAl2O4
Diaspore and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Diaspore and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Diaspore and Spinel Optical Properties during the identification of gemstone. Specific gravity of Diaspore is 3.64-3.66 whereas that of Spinel is 3.64-3.66.