Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 70 Glass and glassware 70 03 Cast glass and rolled glass, not otherwise worked 70 03 12 Non-wired unworked sheets of cast/rolled glass, coloured, opacified, flashed or Commodity Code Description 70 03 12 00 Non-wired unworked sheets of cast/rolled glass, coloured, opacified, flashed or 70 03 12 10 Optical glass, not optically worked 70 03 12 20 Other, in squares or rectangular shape, whether or not one or more corners have been 70 03 12 90 Other