Egyptian faience is a sintered-quartz ceramic material from Ancient Egypt. The sintering process "covered [the material] with a true vitreous coating" as the quartz underwent vitrification, creating a bright lustre of various colours "usually in a transparent blue or green isotropic glass". Its name in the Ancient Egyptian language was tjehenet, and modern archeological terms for it include sintered quartz, glazed frit, and glazed composition. Tjehenet is distinct from the crystalline pigment Egyptian blue, for which it has sometimes incorrectly been used as a synonym.
It is not faience in the usual sense of tin-glazed pottery, and is different from the enormous range of clay-based Ancient Egyptian pottery, from which utilitarian vessels were made. It is similar to later Islamic stonepaste (or "fritware") from the Middle East, although that generally includes more clay.