While comparing Cyprine of Berzelius and Proustite 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 Cyprine of Berzelius and Proustite chemical formula.
Another important criteria for qualitative analysis of gemstones is Cyprine of Berzelius and Proustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cyprine of Berzelius and Proustite Optical Properties during the identification of gemstone. Specific gravity of Cyprine of Berzelius is 5.51-5.64 whereas that of Proustite is 5.51-5.64.