Hollandite and Spinel Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
none
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.05
  
3.64-3.66
  
Fracture
Brittle, Metallic
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Distinct / Good, Prismatic
  
None, but may exhibit slight parting
  
Mohs Hardness
4-6
  
8
  
Chemical Composition
Ba(Mn++++,Mn++)8O16
  
MgAl2O4
  
Hollandite and Spinel Chemical Formula
While comparing Hollandite 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 Hollandite and Spinel chemical formula.
- Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
- Chemical formula of Spinel- MgAl2O4
Hollandite and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hollandite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.