Vivianite and Sard Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.70
  
2.58-2.63
  
Fracture
(e.g. graphite).
  
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
{010} Perfect
  
Not Available
  
Mohs Hardness
Not Available
  
6.5-7
  
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
SiO 2Ulrich Henn and Claudio C.
  
Vivianite and Sard Chemical Formula
While comparing Vivianite and Sard 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 Sard chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
Vivianite and Sard Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Sard Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Sard Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.58-2.63 whereas that of Sard is 2.58-2.63.