Heavy sand, also known as hair of gold, which is gold-rich material obtained by gravity separation. The gold particles in the heavy sand are relatively large, and after manual washing, the gold content can reach more than 50%. In addition to gold-bearing placer, containing mainly pyrite, iron titanium, zircon, quartz and the like. Hybrid Kitchen Exhaust Hood,Kitchen Hood Vent,Kitchen Exhaust,Hood Fan ZHEJIANG LIVEWELL ENVIRONMENTAL TECHNOLOGY CO.,LTD. , https://www.livewellpure.com
Heavy sand concept