When it comes to choosing the best pick among Green Gemstones gemstones, Phlogopite is known to be a popular choice!Physical properties of Phlogopite include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Phlogopite Optical Properties are responsible for imparting various physical properties to its structure. Knowledge of these properties is equally important to gem-cutters as well as to consumers. Phlogopite cleavage is nothing but the plane across which the crystal splits during cutting. Phlogopite cleavage is Perfect basal (001),and specific gravity of Phlogopite is 2.78-2.85.
The physical properties of Phlogopite, in fact, are imparted by the chemical composition of its individual molecule. The reactivity or inertness of the crystal is solely governed by its chemical structure.