Precious & Semiprecious Stones (Excl. Diamonds), Unworked or Simply Sawn

Customs authorities generally interpret 'roughly shaped' as operations that reduce a stone to an approximate form without creating a finished surface or defined facets. Tumbling that produces a smooth, polished surface or cabochon grinding that creates a domed finished face would likely push the stone into the 'otherwise worked' category under 710391 or 710399. Importers should document the specific processing method to defend classification.

Heat treatment is a widely accepted industry practice for enhancing color and clarity, and it does not by itself constitute 'working' for tariff classification purposes — the stone's physical form remains rough. However, importers should disclose treatment on commercial invoices, as treatment status affects gemological value and may be relevant to CBP appraisement. Fracture-filling or coating that alters the stone's surface could be viewed differently.