Product classification
HS code for Rough industrial diamonds: 7102.21
Diamonds, industrial, unworked or simply sawn, cleaved or bruted, but not mounted or set.
Classification of rough industrial diamonds under HS 7102.21
Rough industrial diamonds are classified under HS code 7102.21. This classification falls under Chapter 71, which covers natural pearls, precious stones, and precious metals. Heading 7102 is specifically for diamonds. The Harmonized System distinguishes between industrial and non-industrial (gem-quality) diamonds based on their physical characteristics, such as color, transparency, and structural integrity. Industrial diamonds are those that, due to their flaws, color, or size, are unsuitable for use in jewelry and are instead intended for technical or industrial applications like cutting, grinding, or drilling. The suffix .21 indicates that the diamonds are 'unworked or simply sawn, cleaved or bruted.' This means they have not been polished or finished into final gemstones. The classification is strictly enforced to monitor the trade of industrial materials and to ensure compliance with international regulations like the Kimberley Process, which tracks the origin of rough diamonds.
- Covers
- Unworked industrial diamonds (boart)
- Simply sawn industrial diamond stones
- Cleaved industrial diamonds for tool tips
- Bruted industrial diamonds
- Carbonado (black diamonds) in rough form
- Industrial grade diamond crystals for drill bits
- Also under 7102.21
- Element Six industrial diamonds
- De Beers Industrial Diamonds
- Sumitomo Electric (synthetic industrial diamonds)
- Sandvik (using industrial diamonds)
- Kennametal (using industrial diamonds)
Codes often confused with 7102.21
Common mistake. The most frequent misclassification occurs with HS code 7102.31, which is for non-industrial (gem-quality) rough diamonds. The distinction depends on the intended use and the physical grade of the stone. Another common error is using 7105.10, which is for diamond dust or powder. If the diamond is still in a stone or crystal form, even if small, it belongs in 7102.21. Furthermore, synthetic or laboratory-grown industrial diamonds must not be classified here; they belong under HS code 7104.21, which covers synthetic precious or semi-precious stones in an unworked state.
Top exporters and importers of HS 710221 (the code used for rough industrial diamonds), 2025
In 2025, the largest exporter of HS 710221 (the code used for rough industrial diamonds) in UN Comtrade data was Angola, with 88% of world exports; the largest importer in UN Comtrade data was the United Arab Emirates, with about 86% of world imports. Zimbabwe did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 69% of its exports here ($161M, CEPII BACI), so it may also belong among the top exporters.
Figures cover everything classified under HS 710221, not only rough industrial diamonds.
Top exporters 2025 · share of world exports
- 1 Angola $1.8B 88% of world exports
- 2 United Arab Emirates* ~$86M 4.2% of world exports · partner records ↗
- 3 Russia* ~$30M 1.5% of world exports · partner records ↗
Zimbabwe did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 69% of its exports here ($161M, CEPII BACI), so it may also belong among the top exporters.
World total: $2.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United Arab Emirates* ~$1.4B 86% of world imports · partner records ↗
- 2 India $154M 9.3% of world imports
- 3 Belgium $24M 1.4% of world imports
World total: $1.7B 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 rough industrial diamonds
Brazil classifies rough industrial diamonds under NCM 7102.21.00: HS 7102.21 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about rough industrial diamonds
What is the HS code for Rough industrial diamonds?
The HS code for Rough industrial diamonds is 710221 (Diamonds; industrial, unworked or simply sawn, cleaved or bruted, but not mounted or set). Rough industrial diamonds are classified under HS code 7102.21.
How do I classify Rough industrial diamonds for customs?
Rough industrial diamonds is classified under HS code 710221 — Diamonds; industrial, unworked or simply sawn, cleaved or bruted, but not mounted or set. This is a 6-digit subheading level code.
Do these diamonds require a Kimberley Process certificate?
Yes, almost all international shipments of rough diamonds, including industrial ones under 7102.21, require a Kimberley Process certificate to prove they are conflict-free.
Which countries are the top exporters of rough industrial diamonds (HS 710221)?
In 2025, the top exporters of HS 710221 (the code used for rough industrial diamonds) in UN Comtrade data were Angola ($1.8B, 88% of world exports), the United Arab Emirates (about $86M) and Russia (about $30M). World exports came to about $2.0B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Zimbabwe did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 69% of its exports here ($161M, CEPII BACI), so it may also belong among the top exporters.
Which countries are the top importers of rough industrial diamonds (HS 710221)?
In 2025, the top importers of HS 710221 (the code used for rough industrial diamonds) in UN Comtrade data were the United Arab Emirates (about $1.4B, 86% of world imports), India ($154M) and Belgium ($24M). World imports came to about $1.7B, 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 Rough industrial diamonds the same in all countries?
The base HS code 710221 for Rough industrial 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 rough industrial diamonds in Brazil?
In Brazil, rough industrial diamonds (HS 710221) is classified under NCM 7102.21.00.