Non-metallic building materials, namely, ceramic tiles for covering walls, ceramic floor tiles, paving blocks, not of metal, valances, not of metal and not of textile, ceramic tiles for wall, floor or ceiling, sandstone for use as a building material, natural stone, artificial stone, marble, granite, terracotta for use as building material, sand, bricks, slate, parquet flooring, concrete, mosaic floor tiles, wainscotting, not of metal