Vivianite and Obsidian Physical Properties

Vivianite and Obsidian Chemical Formula

While comparing Vivianite and Obsidian 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 Obsidian chemical formula.

• Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
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Vivianite and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.