When it comes to choosing the best pick among Blue Gemstones gemstones, Precious Opal is known to be a popular choice!Physical properties of Precious Opal include its hardness, gravity, fracture, cleavage, etc. For any gemstone crystal, Precious Opal 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. Precious Opal cleavage is nothing but the plane across which the crystal splits during cutting. and specific gravity of Precious Opal is 1.98-2.25.
The physical properties of Precious Opal, 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 Precious Opal is represented by SiO 2 · nH 2OGemdat.org , Management Team (2012).