Onyx and Milk Opal Physical Properties

Onyx and Milk Opal Chemical Formula

While comparing Onyx and Milk Opal 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 Onyx and Milk Opal chemical formula.

• Chemical formula of Onyx- SiO₂
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Onyx and Milk Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Milk Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Milk Opal Optical Properties during the identification of gemstone. Specific gravity of Onyx is 1.98-2.50 whereas that of Milk Opal is 1.98-2.50.