Julia 48-Piece Dinnerware Set is made of stoneware and is 100% Turkish made. Stoneware is a clay-based material used in making plates and dishes by being fired at 1100-1300 degrees. It is much more durable than ceramic and has lower water absorption compared to ceramic. Due to being fired at higher temperatures, it can be safely used in the microwave, oven, and dishwasher for many years.