When it comes to choosing the best pick among Gems for Sagittarius gemstones, Topaz is known to be a popular choice!Physical properties of Topaz include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Topaz 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. Topaz cleavage is nothing but the plane across which the crystal splits during cutting. Topaz cleavage is [001] Perfect,and specific gravity of Topaz is 3.49-3.57.
The physical properties of Topaz, 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. Chemical composition of Topaz is represented by Al2SiO4(F,OH)2.