... of silicate minerals, the main mineral composition is SiO2, quartz sand color for the translucent milky white or colorless-shaped, silicon ... resistance properties. Quartz sand of the main purposes: the manufacture of glass, refractories, smelting ferrosilicon, metallurgical flux, ceramics, abrasive materials, casting. The ... and removal of iron from a variety of fine quartz sand specifications. quartz ...