There are many different kinds of sand. Sand is defined as a rock material which occurs in the form of loose or angular grains. These grains usually vary in size from 0.06 mm to 2.0mm in diameter which is smaller than the grain of a gravel but larger than that of clay. Sand is usually created through slow weathering of rock where rock pieces are broken up little by little over time . Water and wind are the primary sources of this rock weathering which makes sense given that the largest deposits of sand are usually in deserts or on beaches next to the ocean.
Black Sand