Use our ceramic stone to give your breads and pizzas a marvelous crustiness, like those prepared in a commercial brick oven. Made in the USA, the stone promotes even heat. Holds heat exceptionally well, keeping oven temperature steady (the secret to brick-oven baking). Pulls moisture from the outer surface of the dough to promote perfect crustiness. Made of cordierite ceramic. Includes recipes and instructions. A Williams Sonoma exclusive.