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 Optical glass, not optically worked 70 03 12 10 Optical glass, not optically worked Commodity Code Description 70 03 12 10 00 Optical glass, not optically worked