Heading 6804

Millstones, grindstones, grinding wheels, etc without frameworks, for grinding, sharpening, polishing, etc and parts thereof, natural stone, agglomerated natural or artificial abrasives or of ceramics

680410 Millstones and grindstones; for milling, grinding or pulping 680421 Millstones, grindstones, grinding wheels and the like; of agglomerated synthetic or natural diamond 680422 Millstones, grindstones, grinding wheels and the like; of other agglomerated abrasives or of ceramics 680423 Millstones, grindstones, grinding wheels and the like; of natural stone 680430 Stones; hand sharpening or polishing stones, of natural stone, agglomerated natural or artificial abrasives or ceramics, with or without parts of other materials