Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lirne and cement 25 14 Slate, 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 14 00 Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of rectangular (including square) shape.