The color porcelain enamel on cast iron can be used on gas, electric, ceramic and induction cooktops, as well as in the oven. Not recommended for use on outdoor grills or over open outdoor flames. Not for use in microwaves. Lodge Color Porcelain Enamel on Enamel cast iron round casserole is cast from molten iron in individual sand molds. The porcelain surface eliminates the need to season cast iron. The cast iron vessel has superior heat distribution and retention, evenly heating bottom sidewalls and even the lid. Tightly fitting lid seals in moisture. The excellent heat retention reduces the amount of energy needed for cooking. Two layers of very hard, glossy porcelain enamel are chip resistant and easy to clean. Lid knob is oven safe to 500 degrees Fahrenheit. The black rim on the pot is matte porcelain, not exposed cast iron. Hygienic porcelain enamel is non-reactive with food.