Product classification
HS code for Cut diamonds: 7104.91
Stones, diamonds, n.e.c. in heading 7104, worked or graded but not strung, mounted or set, ungraded synthetic or reconstructed precious or semi-precious stones, temporarily strung for convenience of transport.
Classification of cut diamonds under HS 7104.91
HS code 7104.91 applies to synthetic or reconstructed diamonds that have been worked—meaning they have been cut, faceted, or polished—but are not yet mounted or set into jewelry. Chapter 71 covers natural and cultured pearls, precious stones, and precious metals. Heading 7104 is specifically dedicated to synthetic or reconstructed precious or semi-precious stones. These are stones that have been produced in a laboratory but possess essentially the same chemical, physical, and optical properties as their natural counterparts. The subheading 7104.91 distinguishes diamonds from other synthetic stones (like rubies or sapphires). The "worked" status is a critical classifier; "unworked" synthetic diamonds would fall under 7104.21. This code ensures that lab-grown diamonds used in the gemstone trade are tracked separately from natural diamonds (7102) and from industrial-grade synthetics. The classification remains 7104.91 even if the stones are temporarily strung for transport, provided they are not yet set in metal.
- Covers
- Lab-grown faceted diamonds
- Polished synthetic diamonds
- Cut synthetic diamond gemstones
- Graded lab-grown diamonds (unmounted)
- Reconstructed diamond stones, worked
- Also under 7104.91
- GIA certified diamonds
- Forevermark diamonds (loose)
- various wholesale diamond dealers
- Graff Diamonds (for high-end loose stones)
Codes often confused with 7104.91
Common mistake. The primary misclassification is with 7102.39, which is for natural worked diamonds. Because lab-grown diamonds are chemically identical, they are often misdeclared under the natural diamond code, which has different regulatory requirements. Another error is 7104.21, which is for unworked or simply sawn synthetic diamonds. If the stone has been faceted, it must move to 7104.91. Furthermore, if the diamond is mounted in a ring or earring, it is no longer a "stone" for classification purposes and must be classified as jewelry under 7113.19. Finally, industrial synthetic diamonds are classified under 7104.91 only if they are of gemstone quality; industrial-grade grit or powder falls under 7105.10.
Top exporters and importers of HS 710491 (the code used for cut diamonds), 2025
In 2025, the largest exporter of HS 710491 (the code used for cut diamonds) in UN Comtrade data was India, with 63% of world exports; the largest importer in UN Comtrade data was the United States, with 30% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 710491, not only cut diamonds.
Top exporters 2025 · share of world exports
- 1 India $1.2B 63% of world exports
- 2 Hong Kong $284M 15% of world exports
- 3 United States $123M 6.5% of world exports
World total: $1.9B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $568M 30% of world imports
- 2 Hong Kong $365M 19% of world imports
- 3 China $252M 13% of world imports
World total: $1.9B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for cut diamonds
Brazil classifies cut diamonds under NCM 7104.91.00: HS 7104.91 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about cut diamonds
What is the HS code for Cut diamonds?
The HS code for Cut diamonds is 710491 (Stones; diamonds, n.e.c. in heading 7104, worked or graded but not strung, mounted or set; ungraded synthetic or reconstructed precious or semi-precious stones, temporarily strung for convenience of transport).
How do I classify Cut diamonds for customs?
Cut diamonds is classified under HS code 710491 — Stones; diamonds, n.e.c. in heading 7104, worked or graded but not strung, mounted or set; ungraded synthetic or reconstructed precious or semi-precious stones, temporarily strung for convenience of transport. This is a 6-digit subheading level code.
What is the HS code for cut synthetic diamonds?
The HS code for worked (cut or polished) synthetic diamonds is 7104.91.
How are lab-grown diamonds distinguished from natural ones in the HS?
Natural diamonds are classified under heading 7102, while lab-grown (synthetic) diamonds are classified under heading 7104.
Which countries are the top exporters of cut diamonds (HS 710491)?
In 2025, the top exporters of HS 710491 (the code used for cut diamonds) in UN Comtrade data were India ($1.2B, 63% of world exports), Hong Kong ($284M) and the United States ($123M). World exports came to about $1.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of cut diamonds (HS 710491)?
In 2025, the top importers of HS 710491 (the code used for cut diamonds) in UN Comtrade data were the United States ($568M, 30% of world imports), Hong Kong ($365M) and China ($252M). World imports came to about $1.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Cut diamonds the same in all countries?
The base HS code 710491 for Cut diamonds is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for cut diamonds in Brazil?
In Brazil, cut diamonds (HS 710491) is classified under NCM 7104.91.00.