Section 13 ARTICLES OF STONE, PLASTER,CEMENT,ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE 68 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS 68 04 STONE, OF AGGLOMERATED NATURAL OR ARTIFICIAL ABRASIVES, OR OF CERAMICS, 68 04 23 OTH. MILLSTONES/GRINDSTONES/GRINDING WHEELS & THE LIKE, OF NATURAL STONE Commodity Code Description 68 04 23 00 OTH. MILLSTONES/GRINDSTONES/GRINDING WHEELS & THE LIKE, OF NATURAL STONE