rdance with the present invention, the materials used are essentially the nonferrous, inorganic portion of municipal refuse, coal fly ash, and a binder, such as sodium silicate, as raw materials in fired (fused) building materials.A suitable fly ash is one comprising 41.3% Si O.sub.2 ; 32% Fe .sub.2 O.sub.3 ; and 16% AL .sub.2 O.sub.3 ; -- although other fly ash compositions are also suitable.The