Hollandite and Cordierite Iolite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.05
  
2.56-2.66
  
Fracture
Brittle, Metallic
  
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Distinct / Good, Prismatic
  
Not Available
  
Mohs Hardness
4-6
  
7-7.5
  
Chemical Composition
Ba(Mn++++,Mn++)8O16
  
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
  
Hollandite and Cordierite Iolite Chemical Formula
While comparing Hollandite and Cordierite Iolite 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 Cordierite Iolite chemical formula.
- Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
- Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
Hollandite and Cordierite Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hollandite and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.