This is related to the sediments that make up the beach. The important sources of beach sediments are sediments carried by rivers, coastal erosion substances and seabed sediments, and their main components are seasonable, feldspar and calcite. The hardness in time is high (minerals are classified into 10 in Mohs hardness scale, the hardness of the hardest diamond is 10, and the hardness in time is 7), so it is not easy to have chemical reaction; The hardness of feldspar and calcite is lower than that of time, and it is easy to be chemically decomposed. Therefore, after the dissolution and decomposition of seawater, most of the sediments left on the beach are quartz sand, which can account for 95% to 98% of the total sediments, so the color of the beach we see is basically quartz sand. The color of quartz sand is mainly milky white and light yellow. When yellow and white are mixed together, it looks like a golden beach at first glance.
Pfeiffer Beach in Big Sur, California, USA is a very unique "color" beach. There are abundant manganese-bearing sand grains here, often in shades of purple. They are mixed with ordinary yellow and white sand grains, which adjust wonderful colors on the beach.