Serpentine is a general term for a type of magnesium rich silicate mineral that contains water, such as serpentine, serpentine, and fibrous serpentine. Their color is usually green, but there are also shades of green, light gray, white, or yellow. Serpentine stones are named because they are often green and green in color, resembling snake skin. Serpentine rocks are often distributed at the top of larger ultrabasic rocks in a cap like or edge like manner, and sometimes in a vein like or irregular shape. Smaller rock masses often completely erode into serpentinite. The minerals related to serpentinite include chromium, nickel, cobalt, platinum, asbestos, talc, magnesite, etc. Serpentine rock is also a good fertilizer ingredient.