Vivianite and Cordierite Iolite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.70
  
2.56-2.66
  
Fracture
(e.g. graphite).
  
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
{010} Perfect
  
Not Available
  
Mohs Hardness
Not Available
  
7-7.5
  
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
  
Vivianite and Cordierite Iolite Chemical Formula
While comparing Vivianite 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 Vivianite and Cordierite Iolite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
Vivianite and Cordierite Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.