Emerald and Purpurite Physical Properties

Emerald and Purpurite Chemical Formula

While comparing Emerald 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 Emerald and Purpurite chemical formula.

• Chemical formula of Emerald- Be₃Al₂SiO₆
• Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Emerald and Purpurite Specific Gravity

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