Section 05 Mineral products 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 16 Granite, porphyry, etc, and other monumental or building stone 25 16 12 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including ..) Commodity Code Description 25 16 12 00 Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including ..)