U.S. exports of Synthetic Precious & Semiprecious Stones, Unworked or Roughly Shaped (Other Than Diamonds) (HS 710429) totaled $192K in August 2026.
Synthetic Precious & Semiprecious Stones, Unworked or Roughly Shaped (Other Than Diamonds) imports of $35K in August 2026 ran 45% below the year-to-date monthly average of $63K.
Last updated: August 2026 dataSynthetic rubies, sapphires, emeralds, spinels, and other lab-created or reconstructed gemstones in unworked or roughly shaped form are consolidated under tariff line 7104290000, which serves as the catch-all for non-diamond synthetic stones at this processing stage. Japan and China are the primary suppliers, with India also a significant source — a supply profile that reflects both industrial boule production and the gem trade's rough-material pipeline. Importers classifying these goods must confirm the stone is genuinely synthetic or reconstructed rather than natural, as natural rough stones fall under Chapter 71's separate headings.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
7 import shipments a month
CBP may request a gemological certificate or manufacturer's declaration confirming the stones are lab-created or reconstructed. For high-value shipments, a report from a recognized gemological laboratory (such as GIA or IGI) specifying 'laboratory-grown' or 'synthetic' origin is the most defensible documentation.
It depends on the form. Unworked or roughly shaped synthetic corundum boules intended for industrial use can fall under 7104290000 if they meet the 'precious or semiprecious stone' character. However, if the material has been further processed into optical-grade blanks or wafers, classification may shift to other chapters. A licensed customs broker should review the specific form and end-use.
ImportsExports
Imports
$35KYoY · free account
Exports
$192KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $646K of Synthetic Precious & Semiprecious Stones, Unworked or Roughly Shaped (Other Than Diamonds) and exported $3.2M.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026. Source: U.S. Census Bureau.
Subheading 5 of 5 in heading 7104
Subheading 710429 · $192K of $102.7M
Trade Directory
List your company under HS 710429 — Synthetic Precious & Semiprecious Stones, Unworked or Roughly Shaped (Other Than Diamonds), so the companies trading it can find you. Be the first supplier listed.
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 |
|---|---|---|---|---|---|
| 7104290000 | Synthetic Semi/Precious Stones Unworked Rough Nes | $35K | 12.15% | 100.00% | $4K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7104290000 | Synthetic Semi/Precious Stones Unworked Rough Nes | $192K |
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.
Exports · August 2026
destination
United Kingdom and Ireland together take 70% of it.
customs district
origin
entry
rate provision · imports
duty collected equals 12.15% of imports for consumption.