Section 05 Mineral products 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 16 Granite, porphyry, basalt, sandstone and other monumental or building stone, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. Commodity Code Description 25 16 11 Crude or roughly trimmed 25 16 12 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including) 25 16 20 Sandstone 25 16 90 Porphyry, sylnite, etc, merely cut into a square or rectangular shape