If an item has 22k yellow or white gold luster, or mother of pearl luster, NO. If an item has delicate details, such as sculpted bits, I would err on the side of caution, and not put items the dishwasher. If it is a basic mug, or a bowl, etc., yes. However, pottery is not impervious to damage, so please exercise caution when washing any pottery in the dishwasher.