silica sand (quartz sand) is a pure white sandy rocks contain a high proportion of silica (SiO2 more than 99%) consists mainly of quartz mineral granules contain a small amount of impurities and heavy metals (less than 0.1%). The term glass sand is called silica sand (quartz) that have the physical and chemical specifications commensurate with the glass industry, for example, grain size, which often ranges between 100
- 500 microns and the percentage of iron oxide (Fe2O3) less than 0.05%. Silica sand unfold in several areas

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