Lumber and artificial timber; Stones, rock material used in building flooring, roofing, counter tops, walls, cladding and fireplaces, clay sold in powdered form for use in the manufacture of wall board and plastics, mineral pellets for use in the building industry and non-metallic minerals for building or construction; Artificial stone; Synthetic building stone; Construction materials of artificial stone; Bricks; Tar coatings for use on roofs, walls and pavements; Building materials of plasti...