High-purity quartz sand prepared from synthetic quartz crystals

The invention relates to high-purity quartz sand prepared from synthetic quartz crystals, the hydroxyl content of the synthetic quartz crystals is smaller than or equal to 5 ppm, the content of each of boron, magnesium, titanium, copper, manganese and cobalt in chemical components of the high-purity quartz sand is smaller than or equal to 0.2 ppm, the total content of impurities is smaller than or equal to 20 ppm, and the purity of the high-purity quartz sand is 4N8 or above. The preparation method of the high-purity quartz sand comprises the steps of preparing seed crystals, growing synthetic quartz crystals by using the seed crystals, selecting the synthetic quartz crystals meeting conditions, performing surface treatment, performing water quenching, performing roughing, making sand, performing acid pickling, performing drying, performing magnetic separation and the like. The transparency of the high-purity quartz sand is superior to that of the high-purity quartz sand prepared from imported natural quartz