Dishwasher (avoid high heat), freezer, microwave and oven safe (up to 500 degrees). We recommend hand washing pieces that contain a non-ceramic component, such as metal, gold or platinum; please note these items are not microwave safe. Avoid cleaners that may contain citrus. While not common, over time, metal trail markings may occur on the stoneware surface dependent on your flatware. These marks are not scratches, and not due to a manufacturing defect in our ceramics, but steel residue on top of the glaze left by stainless steel flatware. Using a combination of citrus cleansers and high heat in your dishwasher can lead to more prominent metal markings.