According to the United States Curling Association, a curling stone with its attached handle weighs 42 pounds. The International Olympic Committee states that the granite used for curling stones is a dense granite that is quarried in Scotland.
Curling is an indoor team sport that is played on ice. The object of the game is for a team to get its stones closest to the center of the field. Players sweep the ice with special brushes or brooms to smooth the ice and allow the stone to travel further. They also use the broom to help keep their balance when sliding the stones. Players may block or knock out the stones of the opposing team. Curling is believed to have originated in Scotland in the 16th century. Curling became an Olympic sport in 1924.