The Mabel 48 Piece Dinner Set is made of stoneware and is 100% Turkish. Stoneware is a clay-based material used in the production of plates and bowls, which is fired and baked at temperatures of 1100-1300 degrees. It is much stronger and less absorbent than ceramic. Due to being fired at higher temperatures, it can be safely used in microwave, oven, and dishwasher for many years.