Section 05 MINERAL PRODUCTS 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 21 Limestone flux; limestone and other calcareous stone, of a kind used for the man 25 21 00 25 21 00 00 Commodity Code Description 25 21 00 00 00 Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture