Standard International Trade Classification
U.S. exports of Worked Precious & Semiprecious Stones (Excluding Diamonds), Not Mounted or Set (SITC 66739) totaled $130.6M in August 2026.
Importers of Worked Precious & Semiprecious Stones (Excluding Diamonds), Not Mounted or Set paid $1.6M in duties in August 2026, an average duty rate of 8.01% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Worked Precious & Semiprecious Stones (Excluding Diamonds), Not Mounted or Set imports of $19.5M in August 2026 ran 65% below the year-to-date monthly average of $56.0M.
Last updated: August 2026 dataFaceted, polished, or otherwise finished natural gemstones — rubies, sapphires, emeralds, tourmalines, and similar colored stones — that are loose or only temporarily strung for transport sit in this category, distinct from both rough material and finished jewelry. The parenthetical allowance for 'ungraded stones temporarily strung for transport' is a practical trade accommodation: parcels of mixed calibrated stones shipped on temporary strands remain classifiable here provided they are not permanently assembled. Valuation of worked colored gemstones is notoriously complex because unit prices vary enormously by variety, treatment status, and carat weight, making appraisal documentation essential for CBP entry. Importers should confirm that any permanent stringing or setting occurs after importation to preserve this classification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
801 import shipments a month
Yes. The classification explicitly accommodates ungraded stones temporarily strung solely for transport convenience. The key condition is that the stringing is not permanent and the stones are not set into a mounting. Once the parcel is permanently assembled into jewelry, a different classification applies.
CBP expects commercial invoices itemizing stones by variety, carat weight, treatment status, and unit price. Independent laboratory grading reports (from recognized labs) and appraisals from qualified gemologists strengthen the declared value. For high-value parcels, importers sometimes request a CBP pre-classification or appraisement ruling to avoid disputes at entry.
Basic heading 21 of 766 in section 6
Basic heading 66739 · $130.6M of $13.0B
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Exports · August 2026
destination
Switzerland and Hong Kong together take 64% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$19.5MYoY · free account
Exports
$130.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $532.4M of Worked Precious & Semiprecious Stones (Excluding Diamonds), Not Mounted or Set and exported $2.9B.
Through August 2026. Source: U.S. Census Bureau.