U.S. imports of Synthetic Precious & Semiprecious Stones, Worked but Not Mounted or Set (Other Than Diamonds) (HS 710499) totaled $1.4M in August 2026, imported from 35 countries.
Importers of Synthetic Precious & Semiprecious Stones, Worked but Not Mounted or Set (Other Than Diamonds) paid $182K in duties in August 2026, an average duty rate of 13.19% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Synthetic Precious & Semiprecious Stones, Worked but Not Mounted or Set (Other Than Diamonds) imports of $1.4M in August 2026 ran 48% below the year-to-date monthly average of $2.6M.
Last updated: August 2026 dataCut, faceted, or otherwise worked synthetic gemstones — excluding diamonds — that remain loose and unset are covered by two US tariff lines: 7104991000 for stones cut for jewelry and 7104995000 for those worked but not suitable for jewelry. India leads supply at this stage, followed by Germany and China, reflecting both the gem-cutting trade and industrial synthetic stone production. The jewelry-versus-non-jewelry distinction mirrors the treatment of worked synthetic diamonds and carries the same classification documentation requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
102 import shipments a month
Cubic zirconia is a synthetic material used as a diamond simulant and is generally classified as a synthetic precious or semiprecious stone under heading 7104. Worked, unset cubic zirconia would typically fall under 7104991000 (if cut for jewelry) or 7104995000. Moissanite (synthetic silicon carbide used as a gem simulant) may be classified similarly, but its precise classification can depend on CBP's determination of whether it constitutes a 'precious or semiprecious stone' — a licensed customs broker should confirm the applicable line.
For customs purposes, the country of origin of a worked gemstone is generally the country where the last substantial transformation occurred — typically the country where the stone was cut and polished, not where the rough was grown. This means a synthetic sapphire boule grown in one country but cut in India would ordinarily be declared as Indian origin, which has implications for any applicable trade-remedy measures.
ImportsExports
Imports
$1.4MYoY · free account
Exports
$749KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $25.2M of Synthetic Precious & Semiprecious Stones, Worked but Not Mounted or Set (Other Than Diamonds) and exported $8.0M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 710499 — Synthetic Precious & Semiprecious Stones, Worked but Not Mounted or Set (Other Than Diamonds), so the companies trading it can find you. Be the first supplier listed.
Subheading 2 of 5 in heading 7104
Subheading 710499 · $1.4M of $27.8M
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 |
|---|---|---|---|---|---|
| 7104991000 | Syn/ Recon, Gemstones, Cut But not Set for Jewelry | $742K | 10.29% | 83.88% | $76K |
| 7104995000 | Syn, Rcnstr Gmstones Wrkd Nt Suitbl for Jewelry | $638K | 16.57% | 90.41% | $106K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7104995000 | Syn, Rcnstr Gmstones Wrkd Nt Suitbl for Jewelry | $439K |
| 7104991000 | Syn/ Recon, Gemstones, Cut But not Set for Jewelry | $310K |
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.
Imports · August 2026
origin
India and China together supply 46% of it. China pays 23.5% duty; Japan 8.2%.
customs district
destination
entry
rate provision · imports
13.1% enters free of duty; duty collected equals 13.19% of imports for consumption.