stoneware

A type of pottery intermediate between earthenware and porcelain, being made of clay and a fusible stone.

Stone ware is fired to a point where partial vitrification renders it impervious to liquids, but, unlike porcelain, it is seldom more than faintly translucent. The vitrification makes it unnecessary to add a glaze. Decorative glazes, however, such as salt glaze or lead glaze are sometimes applied.