Hard brittle materials of the family of ceramics are united by their singular lack of ductility. Ceramics are those materials that are held together with nonmetallic or inorganic bonds. Ceramics used in construction typically contain silica (SiO2) as a prime component. Defined in this way, the material family of ceramics includes fired brick and tile, limestone and granite and other stone, cement and concretes, plasters and even glass. In this chapter, "Ceramics" from the book Material Architecture, four different kinds of ceramics are given special attention because of their primary importance in buildings; fired clays, stone, concrete and glass. Each belongs to this group and yet, more than any other material family, they represent a great diversity of properties and individual materials.