Vivianite and Gedrite Physical Properties

Vivianite and Gedrite Chemical Formula

While comparing Vivianite and Gedrite 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 Gedrite chemical formula.

• Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
• Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Vivianite and Gedrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.