All pieces in the SABLO series are made from a unique blend of colored clay, quartz, minerals such as Caltic, and oxides, and are formed using a casting process. The high firing temperatures make stoneware more durable than clay; the colors, shapes, and appearance of the glaze may vary, making each piece one-of-a-kind and capable of exhibiting unique textures and shades. All tableware items in the SABLO series are fired at very high temperatures and do not need to be glazed all over; they are microwave-safe and dishwasher-safe.