Beach sand has a varied composition that is unique to each beach. The sand on most beaches is formed from land rocks that are constantly eroded by wind, water, heat, and even plants. Constant compression and expansion under the influence of temperature changes and water erosion destroy and crush rocks.
The pieces that break off get smaller and smaller until they form sand. Thus, the sand’s composition includes those minerals contained in the stones and rocks in the area. This can affect the color and size of the grains of sand. The second source of sand formation comes from the ocean and is of organic origin. These are tide-ground shells, solid remains of marine organisms, and corals.