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HSChapter 71
U.S. imports of synthetic diamonds, worked but not mounted or set (HS 710491) totaled $28.1M in July 2026, traded with 27 countries.
Importers of Synthetic Diamonds, Worked but Not Mounted or Set paid $2.7M in duties in July 2026 — an effective duty rate of 10% on $26.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Synthetic Diamonds, Worked but Not Mounted or Set imports of $28.1M in July 2026 ran 46% above the year-to-date monthly average of $19.2M.
Last updated: July 2026 dataWorked synthetic diamonds that have been cut, faceted, or otherwise processed but remain loose — not set in jewelry or mounted — split into two US tariff lines based on suitability for jewelry: 7104911000 for stones cut for jewelry use, and 7104915000 for those worked but not suitable for jewelry (typically industrial or technical grades). India dominates supply at this stage, consistent with its role as the world's primary diamond cutting and polishing hub; the United Arab Emirates and Thailand are also significant sources. Importers should be aware that the jewelry-suitability distinction is a classification judgment that can affect duty treatment and should be supported by documentation.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
572 shipments/mo
CBP generally looks at the stone's cut quality, clarity, size, and commercial presentation. Stones with gem-quality faceting, polish, and proportions consistent with jewelry use are classified under 7104911000. Irregularly shaped, heavily included, or industrially processed stones — such as those used in wire-drawing dies or dressing tools — fall under 7104915000. Importers should retain grading reports or manufacturer specifications to support the classification.
India's diamond cutting and polishing industry, centered in Surat, processes the vast majority of the world's loose diamonds — both natural and synthetic. The infrastructure, skilled labor, and trade networks built around natural diamond polishing have been adapted to lab-grown stones, making India the dominant source for cut-but-unset synthetic diamonds entering the US market.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7104911000 | Syn/ Recon, Diamonds, Cut But not Set for Jewelry | $27.8M | 9.47% | 94.58% | $2.6M |
| 7104915000 | Syn, Rcnstr Diamonds Wrkd Nt Suitbl for Jewelry | $304K | 16.62% | 97.85% | $50K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7104911000 | Syn/ Recon, Diamonds, Cut But not Set for Jewelry | $7.8M |
| 7104915000 | Syn, Rcnstr Diamonds Wrkd Nt Suitbl for Jewelry | $1.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Subheading 1 of 5 in heading 7104
Subheading 710491 · $28.1M of $33.5M
ImportsExports
Imports
$28.1MYoY · Pro
Exports
$8.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
India and Botswana together supply 97% of it.
customs district
destination
entry
rate provision · imports
5.4% enters free of duty; the effective duty rate is 9.55%.