Section 13 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIAL S; CERAMIC PRODUCTS; GLASS AND GLASSWARE 68 Articles of stone, plaster, cement, asbestos, mica or similar materials 68 02 Worked monumental or building stone (except slate) and articles thereof, other t 68 02 91 Commodity Code Description 68 02 91 00 68 02 91 10 Prefabricated, further processed 68 02 91 90 Other