How do you make white sand?

The color of sand grains comes from the original material that formed the sand. For example, white sand on tropical beaches is pulverized pieces of dead coral. (Coral skeleton is white because it is made of calcium carbonate, a mineral also found in chalk and human bones.) Quartz is a light-colored mineral, so your white sand beach could also be formed from quartz crystals. Darker sand comes from a number of minerals that are often denser and heavier than tan and quartz. A common mineral giving the beach a dark color is Magnetite. You may also be familiar with black-sanded beaches derived from volcanic sediments