Vivianite and Lapis lazuli Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.64-2.70
2.50-3.00
Fracture
(e.g. graphite).
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
{010} Perfect
3,6
Mohs Hardness
Not Available
5.5
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Vivianite and Lapis lazuli Chemical Formula
While comparing Vivianite and Lapis lazuli 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 Lapis lazuli chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
Vivianite and Lapis lazuli Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.