Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 18 Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; dolomite ramming mix Commodity Code Description 25 18 10 - Dolomite not calcined or sintered 25 18 20 - Calcined or sintered dolomite