Tiles of clay, glass, gypsum, ceramic or earthenware; Alabaster; Construction materials, namely, energy conserving concrete slabs; Works of art of stone; Glass mosaics for use in building construction; Earthenware tiles; Chemically treated wood, namely, wood beams, wood boards, wood joists, wood rafters, wood siding, wood tile floors and flooring, wood trim, wooden beams, wooden flooring, wooden railings, and wooden wainscoting, all of the above containing a fire retardant chemical; Building ...