While comparing Nickeline and Adamite 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 Nickeline and Adamite chemical formula.
Another important criteria for qualitative analysis of gemstones is Nickeline and Adamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nickeline and Adamite Optical Properties during the identification of gemstone. Specific gravity of Nickeline is 4.32-4.48 whereas that of Adamite is 4.32-4.48.