Product classification
HS code for Polished 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 polished diamonds under HS 7104.91
Polished synthetic diamonds are classified under HS code 7104.91. This classification falls within Chapter 71, which governs precious stones and metals. Heading 7104 is specifically reserved for synthetic or reconstructed precious or semi-precious stones, distinguishing them from natural stones. The subheading 7104.91 identifies diamonds that have been "worked"—meaning they have undergone cutting, faceting, or polishing—but are not yet mounted or set in jewelry. The classification is based on the origin of the stone (laboratory-grown via CVD or HPHT methods) and its state of completion. Even if the diamond is of gem quality and visually identical to a natural stone, its synthetic origin mandates classification under 7104 rather than 7102.
- Covers
- Lab-grown polished brilliant-cut diamonds
- Synthetic diamond cabochons
- Worked synthetic industrial diamonds
- Polished lab-created diamond baguettes
- Graded but unset synthetic diamonds
- 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 most common misclassification is using HS code 7102.39, which is for natural polished diamonds. Customs authorities strictly differentiate between natural and synthetic stones; misdeclaring lab-grown diamonds as natural can lead to significant penalties. Another error is using 7104.21, which is for unworked or simply sawn synthetic diamonds. Once a stone has been faceted or polished beyond a rough shape, it must move to 7104.91. Finally, if the diamond is set in a ring or necklace, it must be classified under 7113 as jewelry.
Top exporters and importers of HS 710491 (the code used for polished diamonds), 2025
In 2025, the largest exporter of HS 710491 (the code used for polished 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 polished 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 polished diamonds
Brazil classifies polished 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 polished diamonds
What is the HS code for Polished diamonds?
The HS code for Polished 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 Polished diamonds for customs?
Polished 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 polished synthetic diamonds?
The correct HS code for worked, unset synthetic diamonds is 7104.91.
Are lab-grown diamonds taxed differently than natural ones?
Duty rates often differ between natural (7102) and synthetic (7104) stones depending on the country of import and existing trade agreements. Always verify the specific tariff schedule for your region.
Which countries are the top exporters of polished diamonds (HS 710491)?
In 2025, the top exporters of HS 710491 (the code used for polished 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 polished diamonds (HS 710491)?
In 2025, the top importers of HS 710491 (the code used for polished 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 Polished diamonds the same in all countries?
The base HS code 710491 for Polished 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 polished diamonds in Brazil?
In Brazil, polished diamonds (HS 710491) is classified under NCM 7104.91.00.