human
I'm a little confused about the different types of sand. What is the difference between them?
assistant
Sand is a type of sedimentary rock made up of tiny grains of minerals and quartz. There are three main types of sand: quartz sand, feldspar sand, and garnet sand. Quartz sand is composed of quartz crystals, which are flat-shaped and have a smooth surface. Feldspar sand is composed of two mineral compounds: potassium feldspar and sodium feldspar. Garnet sand is composed of three mineral compounds: almandine garnet, pyrope garnet, and spessartine garnet.