While comparing Norbergite and Sunstone 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 Norbergite and Sunstone chemical formula.
Another important criteria for qualitative analysis of gemstones is Norbergite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Norbergite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Norbergite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.