Silica stone and quartz; quartz; cement for furnaces; cement for blast furnace; magnesia cement; non-metallic roof tiles; asbestos plaster; refractory bricks, not of metal; refractory clay bricks; cooked refractory clay bricks; fireproof cement coating; non metallic fire-resistant building materials, namely, boards and panels for construction; refractory sand; aluminum silicate refractory fiber boards for use in building; refractory non-metal tile for wall floor or ceiling; ceramic fiber cott...