Slabs of stone for building; armor-plating of stone for building, surfaces namely, ornamental, natural, composite or engineered stone; staircases of stone; floor coverings in the nature of stone tiles; prefabricated stone architectural columns; wood particle boards being building materials; marble floor tiles; granite; covering sheets not of metal, in the nature of ornamental, natural, composite or engineered stone; marble for building, specifically for use on floors, walls, countertops and v...