Quartz, inorganic minerals, mainly composed of silica, often contain a small amount of impurities such as Al2O3, CaO, MgO, is a translucent or opaque crystal, usually white, hard texture. Quartz is a physical and chemical properties of mineral resources are very stable, crystal is the three party system of oxide minerals, namely low quartz (a- quartz minerals of quartz), is the most widely distributed a mineral species. Generalized quartz also includes high quartz (b- silica). Also known as silica quartz block, mainly the production of quartz sand (also called silica sand) of raw materials, but also quartz refractory material and firing ferrosilicon material.