Vivianite and Kyanite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.70
  
3.53-3.65
  
Fracture
(e.g. graphite).
  
Splintery, Brittle, Metallic
  
Cleavage
{010} Perfect
  
[100] perfect [010] imperfect with 79° angle between
  
Mohs Hardness
Not Available
  
4-7
  
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
Not Available
  
Vivianite and Kyanite Chemical Formula
While comparing Vivianite and Kyanite 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 Kyanite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
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Vivianite and Kyanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.