U.S. exports of Synthetic Diamonds, Unworked or Simply Sawn/Roughly Shaped (HS 710421) totaled $15.3M in August 2026.
Importers of Synthetic Diamonds, Unworked or Simply Sawn/Roughly Shaped paid $33K in duties in August 2026, an average duty rate of 11.31% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Synthetic Diamonds, Unworked or Simply Sawn/Roughly Shaped imports of $288K in August 2026 ran 12% below the year-to-date monthly average of $327K.
Last updated: August 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.
21 import shipments a month
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.
ImportsExports
Imports
$288KYoY · free account
Exports
$15.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $4.5M of Synthetic Diamonds, Unworked or Simply Sawn/Roughly Shaped and exported $179.9M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7104210000 | Synthetic Diamonds, Unworked or Simply Sawn/Rough | $288K | 11.31% | 98.96% | $33K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7104210000 | Synthetic Diamonds, Unworked or Simply Sawn/Rough | $15.3M |
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.
Trade Directory
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Subheading 2 of 5 in heading 7104
Subheading 710421 · $15.3M of $102.7M
Exports · August 2026
destination
United Arab Emirates and India together take 95% of it.
customs district
origin
entry
rate provision · imports
1.0% enters free of duty; duty collected equals 11.31% of imports for consumption.