Most sand is formed of rock particles that had been broken off from the main rock. They are then weathered by the elements to form the tiny grains commonly known as sand.
Sand is found all over the Earth.
From the beaches of the oceans to the sediment in lakes and rivers, to the wind-blown dunes of the desert, sand is everywhere. Sand is mostly made up of quartz, but may also include calcite, basalt, and other trace minerals.