It is natural mineral abrasive that appears in many forms everywhere on Planet Earth.
Quartz is one of the common minerals that could be found everywhere. Its formula is silicon dioxide or SiO. Pieces of quartz in nature may have different shape and color. Usually it is colorless or white but it may have great variety of colors.
Quartz is tough and inert mineral and has hardness of 7 on the Mohs Scale (A scale of 1 to 10 to compare and order minerals by their main quality – hardness. Based on this characteristics we use it properly as abrasives and polishers). It could be found mostly in light-colored rocks or sandstones