Curling is a sport that involves sliding a granite stone over a patch of ice. The Winter Olympics has generated a lot of excitement about the fascinating sport of curling. As a result, demand for curling stones has increased. Curling stones are made from blue Trefor granite. There are limited deposits of blue Trefor, and other types of granite are poor substitutes. If the increase in demand for curling stones persists, do you expect the long-run equilibrium price to increase, decrease, or stay the same?