Jet and Vivianite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.19-1.35
  
2.64-2.70
  
Fracture
ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
(e.g. graphite).
  
Cleavage
Not Available
  
{010} Perfect
  
Mohs Hardness
2.5-4
  
Not Available
  
Chemical Composition
Not Available
  
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
Jet and Vivianite Chemical Formula
While comparing Jet and Vivianite 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 Jet and Vivianite chemical formula.
>- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Jet and Vivianite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Jet and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Jet and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Jet is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.