Poker is not only made of paper, but also made of many other materials. There are cloisonne gold coated poker, gold foil and silver foil poker, crystal poker, agate poker, ivory poker, elephant bone poker, ox horn and ox bone poker, bamboo poker, plexiglass poker, fiberglass poker... These cards are used for collection, and rarely used for playing. For example, agate poker, ivory elephant bone poker and ox horn and ox bone poker are all made into the shape of mahjong, but they still play poker.