Boulder with the eight horses of King Mu

The image shows a black and white oval object with a smooth surface. The object has dark spots on its upper left and lower right sides. A number is written on the top. The object features a carved scene. Eight horses and a boulder are depicted in the carving. The background is gray. A small white rectangle with black text reading "THE METROPOLITAN MUSEUM" is at the bottom. The object is titled "Boulder with the eight horses of King Mu".