Decorative aquarium stones; Decorative hearth extensions in the nature of fireproof tiles made of non-metal, non-combustible materials used to decorate and protect the floor surface immediately in front of fireplaces; Refractory blocks, not of metal; Refractory bricks, not of metal; Refractory castable mixes, not of metal; Refractory concrete; Refractory construction materials, not of metal; Refractory shapes, not of metal; Rock materials used in building flooring, roofing, countertops, walls, cladding and fireplaces; Slag stone; Fireplace bricks; Non-combustible fireplace surrounds and decorative fireplace facings made of non-metal non-combustible materials; Non-metal building materials, namely, concrete, road base in the nature of an aggregate mixture of sand and stone, back fill in the nature of stone and gravel, and aggregates made using metallurgical slag, namely, steel slag, iron slag, and copper slag, all of the aforementioned slags being in the nature of stony waste matter having been separated from their respective metals during the smelting or refining of ores and/or scrap metal