Pleonast and Onyx Physical Properties

Pleonast and Onyx Chemical Formula

While comparing Pleonast and Onyx 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 Pleonast and Onyx chemical formula.

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• Chemical formula of Onyx- SiO₂

Pleonast and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pleonast and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pleonast and Onyx Optical Properties during the identification of gemstone. Specific gravity of Pleonast is 2.55-2.70 whereas that of Onyx is 2.55-2.70.