Natural marble: The mortar and pestle set are made of marble. The inside of the mortar is as rough as the pestle head, which enhances friction and is easy to grind and crush. The long pestle can be gripped more effectively to minimize energy loss. Unique existence: Due to the change of the natural color of marble, each mortar and pestle is unique, (please allow a slight difference in the color ). The polished surface of the marble crusher on the outer wall is smooth and beautiful, used to decoratethe kitchen The counter is a very good choice.The mortar and pestle are hand-grinded and polished, please allow dimensional errors Easy to Clean: Just rinse the pestle and mortar with sponge thoroughly in warm water, and it doesnt leave any odor behind. Made from pure natural granite, please wash before the first use to remove the granite powder on the surface. Multi-purpose: This heavy-duty marble mortar is very strong,and it can be easily finished by grinding dry or wet ingredients. Mortar and pestle set can be used to make homemade guacamole, pesto, salsa, and can easily mash garlic, pepper, ginger, nuts,herbs or spices, etc. Please rinse the mortar and pestle with clean water before use