Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 19 Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure Commodity Code Description 25 19 10 - Natural magnesium carbonate (magnesite) 25 19 90 - Other