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End-UseCategory 4
U.S. imports of gem diamonds (End-Use 42100) totaled $266.2M in April 2026, traded with 55 countries.
Importers of Gem Diamonds paid $5.1M in duties in April 2026 — an effective duty rate of 9.8% on $51.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Gem Diamonds imports of $266.2M in April 2026 ran 27% below the year-to-date monthly average of $366.5M.
Last updated: April 2026 dataGem diamonds imported into the United States represent one of the highest-value per-unit commodity categories in US trade, with rough stones subject to Kimberley Process Certification Scheme requirements and polished stones requiring precise HTS classification to determine applicable duty treatment. The distinction between rough, simply sawn, cleaved, or bruted diamonds versus cut and polished stones carries significant classification consequences. Importers should also be aware that certain diamond origins have historically been subject to trade restrictions or sanctions, making origin documentation a critical compliance element.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Rough diamonds imported into the US must be accompanied by a Kimberley Process Certificate issued by the exporting country's designated authority, and the shipment must arrive in a tamper-resistant container. US Customs and Border Protection enforces these requirements at the port of entry. Shipments lacking valid KP documentation are subject to seizure.
The HTS distinguishes between unsorted rough diamonds, sorted rough diamonds, simply sawn or cleaved stones, and fully cut and polished gems, each falling under different subheadings with potentially different duty rates. Misclassifying a partially processed stone can result in underpayment of duties or admissibility issues. Consulting a licensed customs broker with gemstone experience is advisable for complex shipments.
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End-Use codes describe different products on the import and export sides. Cross-direction exports are not shown for this slug.
Monthly import values over time