Profile 　Quartz is mineral consisting of silicon dioxide. Approximately 12% of the earth crust is composed of quartz, making it the second most common mineral after feldspar. Quartz has a hardness of 7 and a specific gravity of 2.65. It is brittle, and has conchoidal fracture and a vitreous luster. Captain may be white or colorless and transparent. Various metallic impurities can cause quartz to have different colors. It has piezoelectric and thermoelectric properties. Chemical composition: SiO2

Quartz Powder (Silica Powder)

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　Quartz powder is chiefly used for glass products, machinery (casting), metallurgy, ceramic glazes, fire-resistant materials, cement, and chemicals. Quartz is used by the glass industry in the manufacture of plate glass, fiber reinforced glass, embossed glass, hollow glass, glass foam, glass bricks, various types of packaging bottles and jars, and the following types of glassware: Beer bottles, drinking glasses, thermos bottles, and in glass ornaments. Quartz can also be used to manufacture optical glass, glass instruments, glass fiber, conducting glass, and special radiation-shielding glass. The casting industry uses quartz powder as mold sand. The metals industry uses quartz in smelting additives, fluxes, and various ferrosilicon alloys. The fire resistant materials industry uses quartz to make high-temperature kiln bricks, ordinary bricks, and other fire-resistant materials. The cement industry uses quartz sand as an additive in cement, and also uses it in aerated concrete and general products. The chemical industry uses quartz to manufacture water glass, silica gel, drying agents, and petroleum refining catalysts. Quartz powder is used in external wall paints and road dividing line paints. Use of quartz can meet the needs of glass-and ceramic-making, fire-resistant materials, chemical production, environmental protection, and grinding. Quartz powder is used in paper, paints, plastic, and rubber as an additive or a filler.