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HSChapter 71
U.S. imports of synthetic diamonds, unworked or simply sawn/roughly shaped (HS 710421) totaled $362K in April 2026, traded with 10 countries.
Importers of Synthetic Diamonds, Unworked or Simply Sawn/Roughly Shaped paid $53K in duties in April 2026 — an effective duty rate of 16% on $342K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataLab-grown diamonds in their raw or minimally processed state — unworked, simply sawn, or roughly shaped — enter US commerce under a single tariff line, 7104210000, distinct from natural diamonds and from worked synthetic stones. Germany and China are the leading suppliers, reflecting both industrial-grade production for abrasive and cutting applications and the growing gem-quality lab-grown diamond trade. Classification at this stage hinges on the degree of processing: any further faceting or polishing moves the goods into the worked subheadings under 7104.91.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Customs guidance generally treats sawing and rough shaping as minimal operations that do not alter the stone's fundamental form. Once a synthetic diamond has been cut, faceted, bruted, or polished to a finished or near-finished gem shape, it crosses into the 'worked' category under subheading 7104.91, regardless of whether it has been set in jewelry.
Yes — at the unworked or simply sawn stage, both gem-quality (CVD or HPHT) and industrial-grade synthetic diamonds are classified under 7104210000. The US schedule differentiates by intended use only at the worked stage, where 7104911000 covers stones cut for jewelry and 7104915000 covers those not suitable for jewelry.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| UNITED ARAB EMIRATES | -- | $13.1M | +$13.1M |
| INDIA | -- | $272K | +$272K |
| GERMANY | $159K | -- | -$159K |
| CANADA | -- | $135K | +$135K |
| CHINA | $117K | -- | -$117K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7104210000 | SYNTHETIC DIAMONDS, UNWORKED OR SIMPLY SAWN/ROUGH | $362K | 15.57% | $53K |
SYNTHETIC DIAMONDS, UNWORKED OR SIMPLY SAWN/ROUGH
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7104210000 | SYNTHETIC DIAMONDS, UNWORKED OR SIMPLY SAWN/ROUGH | $13.6M |
SYNTHETIC DIAMONDS, UNWORKED OR SIMPLY SAWN/ROUGH
174.6K 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 |
|---|---|---|---|
| Washington | $143K | $13.1M | +$13.0M |
| New York | -- | $383K | +$383K |
| Utah | $115K | -- | -$115K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| JFK INTERNATIONAL AIRPORT, NY | -- | $13.4M | +$13.4M |
| CLEVELAND, OH | $64K | $169K | +$105K |
| NEW ORLEANS, LA | $161K | $30K | -$132K |