What is the difference between quartz sandstone and quartz sand?
Quartzite, the main mineral is quartz, can contain mica minerals and hematite, goethite, etc.. Quartzite is a kind of metamorphic rock composed mainly of quartz (quartz content of more than 85%). It is formed by recrystallization and recrystallization of quartz sandstone or other siliceous rocks. It is also possible that the siliceous rocks in the vicinity of the magma are formed by thermal contact metamorphism.
Quartz sandstone is a consolidated sandy rock formed by cementation of quartz sand with siliceous cement. More than 99% content in quartz sand; siliceous cement as Opal and chalcedony, they can develop into the secondary enlargement of quartz sand around the cement, quartz sand deposit formation. According to the size of the particles is divided into coarse sandstone, medium grained sandstone and fine sandstone; according to the different cementing is divided into: calcareous sandstone, siliceous sandstone, feldspathic sandstone, etc.. The quartz sandstone is white, yellow, red and so on. Sometimes due to the influence of weathering and relaxation of the structure to become soft sandstone. Pure texture, SiO2 content of up to 97%. In the ceramic industry, mainly used as material of barren quartz sandstone, in order to reduce the plasticity of the embryo, reduce the drying shrinkage and deformation of products; sandstone containing high silicon, low iron, generally can be used for glass industry; raw materials used for calibration siliceous cement industry, used to adjust the rate of silicate clinker. In the Sinian strata of North China, the quartz sandstone and sedimentary quartzite are widely distributed in the Devonian of Southern China.
