While comparing Riesling Beryl and Phlogopite 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 Riesling Beryl and Phlogopite chemical formula.
Another important criteria for qualitative analysis of gemstones is Riesling Beryl and Phlogopite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riesling Beryl and Phlogopite Optical Properties during the identification of gemstone. Specific gravity of Riesling Beryl is 2.78-2.85 whereas that of Phlogopite is 2.78-2.85.