Sand, gravel, crushed stone for building and construction, asphalt, bitumen, cement, gypsum for use as building materials, plaster, concrete, marble blocks for construction; building materials as finished products made of concrete, gypsum, clay, potters' clay, stone, marble, wood, plastics and synthetic materials for building, construction, road construction purposes, namely, concrete panels, clay roofing tiles, building stone, wood joists, lumber; non-metallic buildings, namely, prefabricate...