The rectangular pizza stone is made of heat-retaining clay that"s fired at over 2300° F for great baking results every time. It has a heat core that evenly distributes heat to make your pizza crusts even better. You can prepare restaurant-like pizzas, breads, rolls and biscuits on this ceramic pizza stone. Just preheat the stone for 25-30 minutes and place the pizza on it for baking. It"s durable and withstands thermal shock. Recipes and instructions included.