ceramica vitrea

Also known as Islamic stone-paste, stone-paste, frit ware, stonepaste

thumb|400px|Chinese porcelain dish (left), 9th century, excavated in [[Iran, and a fritware dish made in Iran (right), 12th century (British Museum)]] thumb|Blue and white bowl with radial design, 13th century, Iran (Brooklyn Museum) thumb|right|Dish with cypress tree decoration, 1570–1575, İznik pottery|İznik ([[Calouste Gulbenkian Museum)]] Fritware, also known as stone-paste, is a type of pottery in which ground glass (frit) is added to clay to reduce its fusion temperature. The mixture may include quartz or other siliceous material. An organic compound such as gum or glue may be added for