Rossmanite and Purpurite Physical Properties

Rossmanite and Purpurite Chemical Formula

While comparing Rossmanite 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 Rossmanite and Purpurite chemical formula.

• Chemical formula of Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
• Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Rossmanite and Purpurite Specific Gravity

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