When it comes to choosing the best pick among Red Gemstones gemstones, Polyhalite is known to be a popular choice!Physical properties of Polyhalite include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Polyhalite 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. Polyhalite cleavage is nothing but the plane across which the crystal splits during cutting. Polyhalite cleavage is Perfect on ; parting on ,and specific gravity of Polyhalite is 2.78.
The physical properties of Polyhalite, 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.