Belgian Marble is a type of marble game that has been popular since the 19th century. It consists of four pieces, including a Rance (5 letters), an AGATE (5 letters), a Steelie (7 letters) and a TAW (3 letters). The Rance is a round piece made of wood or plastic, the AGATE is a flat disc made of glass, the Steelie is a steel ball, and the TAW is a larger wooden or plastic piece. Players take turns shooting the Steelie at the other pieces in order to knock them out of the playing area. The player who knocks out all of their opponent's pieces first wins the game.