19 Sale of semi-worked stone. Namely, marble, granite, limestone, sandstone, and other types of stone in the slab and tile format.
37 Installation services of stone products. Mainly, counter tops, floor coverings, and wall coverings. Commercial and residential, interior and exterior.
40 The fabrication of finished stone products from semi-worked stone. Products include table tops, counter tops, floor coverings and wall coverings. Specifically, the cutting, gringing, shaping, and polishing of stone by abrasion.