human
I've heard that there are many different types of sand. What are they?
assistant
Sand is a type of sedimentary rock made up of tiny particles of mineral and organic matter. There are three main types of sand: quartz, feldspar, and clay. Quartz sand has sharp edges and is usually white or gray in color. Feldspar sand is light tan to reddish-brown in color. Clay sand is brown to yellowish-gray in color.