Poudretteite and Purpurite Physical Properties

Poudretteite and Purpurite Chemical Formula

While comparing Poudretteite and Purpurite 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 Poudretteite and Purpurite chemical formula.

• Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Poudretteite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poudretteite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.