6804            |    Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting, hand sharpening or polishing stones, and parts thereof, of natural stone, of agglomerated natural or artificial abrasives, or of ceramics, with or without parts of other materials.
6804.10.00   - Millstones and grindstones for milling, grinding or pulping
6804.21.00     -- Of agglomerated synthetic or natural diamond
6804.22.00     -- Of other agglomerated abrasives or of ceramics
6804.23.00     -- Of natural stone
6804.30.00   - Hand sharpening or polishing stones