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Silica Stones Mines Prices

Also known as silica, Quartz, Quartz stone is a texture hard, wear-resisting, stable chemical properties of silicate minerals, in nature exist in Quartz sandstone, quartzite and vein Quartz. 1, ordinary quartz sand SiO2 90-99 Fe2O3 0.06 or less - 0.02 or higher, refractoriness 1750 ampamp8451 , the exterior part of the larger particles, the surface has a yellow skin cyst. 3, high purity ...

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