Section 13 ARTICLES OF STONE, PLASTER,CEMENT,ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE 69 Ceramic Products 69 02 REFRACTORY BRICKS, BLOCKS, TILES... (EXCL. SILICEOUS FOSSIL MEAL/EARTH) Commodity Code Description 69 02 10 Containing by weight, singly or together, more than 50% of the elements Mg, Ca o 69 02 20 Containing by weight more than 50% of alumina (Al2O3), of silica (SiO2) or of a 69 02 90 Other