When it comes to choosing the best pick among Yellow Gemstones gemstones, Biotite is known to be a popular choice!Physical properties of Biotite include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Biotite 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. Biotite cleavage is nothing but the plane across which the crystal splits during cutting. Biotite cleavage is Perfect on the ,and specific gravity of Biotite is 2.7-3.3.
The physical properties of Biotite, 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 Biotite is represented by K(Mg,Fe++)3[AlSi3O10(OH,F)2.