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HSChapter 71
U.S. imports of synthetic diamonds, worked but not mounted or set (HS 710491) totaled $19.5M in April 2026, traded with 24 countries.
Importers of Synthetic Diamonds, Worked but Not Mounted or Set paid $1.9M in duties in April 2026 — an effective duty rate of 10% on $19.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Synthetic Diamonds, Worked but Not Mounted or Set imports of $19.5M in April 2026 ran 26% above the year-to-date monthly average of $15.5M.
Last updated: April 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.
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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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7104911000 | SYN/ RECON, DIAMONDS, CUT BUT NOT SET FOR JEWELRY | $19.1M | 10.01% | $1.9M |
| 7104915000 | SYN, RCNSTR DIAMONDS WRKD NT SUITBL FOR JEWELRY | $377K | 16.88% | $64K |
SYN/ RECON, DIAMONDS, CUT BUT NOT SET FOR JEWELRY
SYN, RCNSTR DIAMONDS WRKD NT SUITBL FOR JEWELRY
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7104911000 | SYN/ RECON, DIAMONDS, CUT BUT NOT SET FOR JEWELRY | $3.5M |
| 7104915000 | SYN, RCNSTR DIAMONDS WRKD NT SUITBL FOR JEWELRY | $669K |
SYN/ RECON, DIAMONDS, CUT BUT NOT SET FOR JEWELRY
128.5K no
SYN, RCNSTR DIAMONDS WRKD NT SUITBL FOR JEWELRY
656.6K gm
GOLD, NONMONETARY, UNWROUGHT NESOI
HS 710812
SILVER, UNWROUGHT NESOI
HS 710691
JEWELRY AND PARTS THEREOF, OF OTH PRECIOUS METAL
HS 711319
OTH PREC METL ARTCLS OR ARTCLS CLAD W PM, NESOI
HS 711590
RHODIUM, UNWROUGHT OR IN POWDER FORM
HS 711031
DIAMONDS, NONINDUSTRIAL, WORKED
HS 710239
| State | Imports | Exports | Balance |
|---|---|---|---|
| New York | $14.7M | $2.5M | -$12.3M |
| California | $898K | $427K | -$472K |
| Louisiana | $370K | $594K | +$223K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| JFK INTERNATIONAL AIRPORT, NY | $18.3M | $2.4M | -$15.9M |
| NEW ORLEANS, LA | $423K | $467K | +$43K |
| MIAMI INTERNATIONAL AIRPORT, FL | -- | $558K | +$558K |