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Discover how sand forms, its mineral types, and what it reveals about earths surface … · sand, mineral, rock, or soil particles that range in diameter from 0. 02 to 2 mm (0. 0008–0. 08 inch). · sand can be defined as the mixture of small fine grains of granular materials and rock. · sand is more than just grains. · learn what sand is, its composition, where it comes from, its uses, and whether its a renewable resource. The composition of sand varies, depending on the local rock sources and conditions, but the most common constituent of …