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quartz sand It is a hard, wear-resistant, stable chemical properties of silicate minerals, the main mineral composition is SiO2, quartz sand color for the translucent milky white or colorless-shaped, silicon content: ≥ 99.6% iron content: ≤ 0.015 % Melting Point: 1750 degree, hardness 7, the relative density of 2.65, can not dissolve in acid, with high fire resistance properties. Quartz sand of the main purposes: the manufacture of glass, refractories, smelting ferrosilicon, metallurgical flux, ceramics, abrasive materials, casting. The company produces high-quality products using selected natural quartz stone, broken, screening, grading and removal of iron from a variety of fine quartz sand specifications.