Stone that has been cut or sawn to produce a flat surface — without further shaping, polishing, or surface treatment — falls under the 'simply cut' subheadings (680221, 680223, 680229). Once the stone is polished, profiled, carved, sandblasted, or otherwise further processed, it moves to the 'worked' subheadings (680291–680299). The degree of surface finishing is the operative distinction.

Yes. Certain worked stone products — particularly quartz surface products and some marble or granite articles — have been subject to AD/CVD orders depending on the country of origin. Importers should check the current scope of any applicable orders with CBP or the International Trade Commission before entry, as scope determinations can be product-specific.