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