Classification of composite jewelry articles follows the essential character rule: CBP evaluates which component gives the article its primary identity, considering value, weight, and commercial function. A resin pendant on a brass chain might classify here if the pendant is the dominant element, but if the metal chain and findings constitute the bulk of the value, base-metal jewelry classification could apply instead. A binding ruling from CBP is advisable for recurring multi-material styles.

Importers must demonstrate substantial transformation in the claimed country of origin — typically showing that the manufacturing steps performed there (cutting, molding, assembly, finishing) are sufficient to confer a new and distinct article of commerce. Bills of materials, production records, and supplier affidavits are standard supporting documents; CBP may also conduct factory audits for high-risk supply chains.