Pietersite and Onyx Physical Properties

Pietersite and Onyx Chemical Formula

While comparing Pietersite 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 Pietersite and Onyx chemical formula.

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• Chemical formula of Onyx- SiO₂

Pietersite and Onyx Specific Gravity

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