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 manufacture of lime or cement. 25 21 00 Limestone flux;limestone and other calcareous stone, of kind used for the manufacture... Commodity Code Description 25 21 00 00 Limestone flux;limestone and other calcareous stone, of kind used for the manufacture...