This is quite a heavy/sturdy/stable well made piece of genuine marble for it's size, that will withstand just about anything you can fit into it's small space for grinding. The inside diameter is approx. three medium sized fingers straight across, so it's roomy enough to grind spices, seeds, nuts, pills/tablets etc comfortably. If you want a quieter experience go for one that's larger, as the pestle tends to clang against the inside rim/sides despite handling with care. Highly polished surface makes it easy to clean. And, it's a cute piece to leave out on display when not in use. Each piece will be unique with it's own natural designs, a lovely gift of nature.