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 22 OTH. MILLSTONES/GRINDSTONES/...OF OTH.AGGLOMERATED ABRASIVES/CERAMICS Commodity Code Description 68 04 22 00 OTH. MILLSTONES/GRINDSTONES/...OF OTH.AGGLOMERATED ABRASIVES/CERAMICS