sand

River sand is a natural, coarse material extracted from riverbeds, known for its smooth texture and high cohesiveness. It is used in various construction applications, including concrete production, plastering, and landscaping. River sand's properties, such as its rounded and smooth granules, make it ideal for creating workable and cohesive mixtures. It is also valued for its ability to trap impurities, making it useful in filtration systems and pool installations.