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SITCSection 6
U.S. imports of worked synthetic or reconstructed precious & semiprecious stones, nes (SITC 66749) totaled $31.9M in July 2026, traded with 41 countries.
Importers of Worked Synthetic or Reconstructed Precious & Semiprecious Stones, NES paid $3.0M in duties in July 2026 — an effective duty rate of 9.8% on $30.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Worked Synthetic or Reconstructed Precious & Semiprecious Stones, NES imports of $31.9M in July 2026 ran 45% above the year-to-date monthly average of $22.0M.
Basic heading 175 of 766 in section 6
Basic heading 66749 · $31.9M of $26.7B
Faceted, polished, or otherwise finished synthetic and reconstructed gemstones — not elsewhere specified and excluding piezo-electric quartz — that are loose or only temporarily strung for transport occupy this residual category, capturing the broad range of lab-created colored stones after processing but before mounting. The 'not elsewhere specified' qualifier means importers must first confirm the stone does not fit a more specific synthetic-stone heading before landing here. Cubic zirconia, synthetic moissanite (when not classified as a diamond simulant under a more specific provision), and reconstructed turquoise or lapis are examples of materials that may route through this heading depending on their processing state. Because synthetic stones are frequently used as diamond simulants, CBP may scrutinize shipments to verify that natural diamonds are not being misclassified as synthetics to reduce duty or evade Kimberley Process requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
668 shipments/mo
The NES designation means this heading is a catch-all: importers should first check whether the specific stone type (e.g., synthetic diamond, piezo-electric quartz) has its own dedicated classification. If no more specific provision applies and the stone is synthetic or reconstructed, worked, and not permanently strung or set, this heading is appropriate. A binding ruling request to CBP is advisable for novel or ambiguous synthetic materials.
The primary concern is misclassification of natural diamonds as synthetic stones to reduce dutiable value or circumvent Kimberley Process documentation requirements. CBP may request laboratory analysis or grading certificates to confirm synthetic origin. Importers should retain manufacturer certificates, spectroscopic test results, or recognized lab reports that positively identify the stones as lab-created.
Supplier Network
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Imports · July 2026
origin
India and Botswana together supply 94% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$31.9MYoY · Pro
Exports
$10.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.