Pebbles are small roundish stones which could be either machined or natural. The sandstone pebbles are either roundish or squarish in shape.The pebble stones are available in various colors based on which they are named as - pink sandstone pebbles; silver gray sandstones pebbles; beige sandstone pebbles; mica white pebbles; rainbow sandstone pebbles; red sandstone pebbles; chocolate sandstone pebbles and brown sandstone pebbles