How often does the curling stone turn ?
Also called a stone Roll : Any movement of a stone after striking another Rotation : Description of a spinning rock Rub : When a moving stone barely touches another stationary stone ; less contact than a chip Run : A section of the curling sheet that is dipped or troughed that can prevent a stone to curl or draw down its normal path of travel Runback : See raise takeout Running surface : The part of the rock which comes in contact with the ice .