While comparing Achroite and Painite 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 Achroite and Painite chemical formula.
Another important criteria for qualitative analysis of gemstones is Achroite and Painite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Painite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 4.00-4.03 whereas that of Painite is 4.00-4.03.
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