This mortar and pestle are made from solid black granite-a beautiful complement to natural kitchen surfaces. The unpolished interior surface has a rough texture that aids in grinding garlic, whole spices and fresh herbs and in making pesto, curry pastes and other sauces. Traditional mortar and pestle made of solid natural granite. Unglazed stone has a rough texture that helps create friction for efficient grinding. Exterior is smooth polished granite. Heavyweight granite is very stable during use. Can be used for both wet and dry mixtures. A Williams Sonoma exclusive.