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