Abstract: High purity quartz is a general term for quartz series products with SiO₂ contents greater than 99.9%. Its essence is a quartz crystal raw material with extremely high SiO₂ purity and certain particle size obtained from natural quartz ore by purification and processing. The concept of high purity quartz should have the characteristics of purity, particle size and mineral phase at the same time. According to the production and application of high purity quartz in China, the product grade classification is further improved, and high purity quartz products are divided into four product grades: high grade (4N8), intermediary grade (4N5), medium grade (4N) and low grade (3N). At present, natural quartz crystals, vein quartz and granite pegmatite quartz can be used as raw materials for high purity quartz products. Among them, vein quartz is the primary raw material for the production of high purity quartz in China. Based on the purification effect of natural quartz crystals and vein quartz, the raw material of high purity quartz can be divided into four grades corresponding to the grades of high purity quartz series products. They are class-A ore (high quality ore or high quality raw material), class-B ore (secondary ore or secondary raw material), class-C ore (medium ore or medium raw material) and class-D ore (inferior ore or inferior raw material) for the production of high purity quartz products from high-grade to low-grade, respectively. It is the direction we should strive to find high quality raw materials that can stably meet the demands of industrial production and solve the localization of 4N8 high grade high purity quartz.