Vivianite and Hardystonite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.70
  
3.396-3.443
  
Fracture
(e.g. graphite).
  
Brittle, Metallic
  
Cleavage
{010} Perfect
  
[001] good, [100] and [110] fair
  
Mohs Hardness
Not Available
  
3-4
  
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
  
Vivianite and Hardystonite Chemical Formula
While comparing Vivianite and Hardystonite 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 Hardystonite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Vivianite and Hardystonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.