Building materials, namely, clay bricks and roofing tiles and granite and ceramic tiles; refractory materials, namely, refractory bricks, refractory mortar and refractory linings of furnaces and refractory castable mixes consisting of materials to form refractory mortar and refractory concrete, refractory shapes for uses in furnaces; wood veneers; building glass, namely, glass blocks for walls and partitions in buildings, floating glass, safety glass, rolled glass, insulating glass and sound proof glass all for windows and doors in the construction of buildings, glass floor slabs and glass tiles for the construction of floors in buildings and glass granules for marking roads