Vivianite and Iolite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.70
  
2.6-2.7
  
Fracture
(e.g. graphite).
  
Not Available
  
Cleavage
{010} Perfect
  
3,1
  
Mohs Hardness
Not Available
  
7-7.5
  
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
Mg2Al4Si5O18
  
Vivianite and Iolite Chemical Formula
While comparing Vivianite and 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 Iolite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Iolite- Mg2Al4Si5O18
Vivianite and Iolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.