Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 20 Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) whether or not coloured, with or without small quantities of accelerators or retarders Commodity Code Description 25 20 10 - - - Gypsum 25 20 20 - - - Plaster of Paris