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Natural sand is rock particles formed by natural conditions. For example, rocks are weathered or washed by sea water, mainly including river sand, quartz sand, and sea sand.
Natural sand is widely used in the field of infrastructure construction.
River sand is a non-metallic ore with complex composition, smooth surface and high impurity content, which is produced by repeated collision and friction of rocks under the force of water for a long time in the natural state. It is mostly used in construction, concrete, cementitious materials, road construction materials, artificial marble, cement physical performance test materials (ie cement standard sand), etc. River sand can also be used in foundry, metallurgy, heat treatment, steel structure, frame structure, repair, bridge, mine and other fields.
https://www.lzzgmachine.com/orestypes/differences-in-the-use-of-quartz-sand-river-sand-and-sea-sand.html
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