Industrial diamond
World natural industrial diamond mine production and reserves, 2024–2025
Share of world natural industrial diamond mine production, 2025 · world total 38 million carats
- Russia 42%
- DR Congo 18%
- Botswana 13%
- Zimbabwe 13%
- South Africa 7.9%
- Angola 2.6%
- Other countries 2.6%
Russia accounted for 42% of world natural industrial diamond mine production in 2025 (16 million carats of 38 million carats). China supplied 77% of U.S. imports of industrial diamond in 2021–24, more than any other country. The three largest producers, Russia, DR Congo, and Botswana, together supplied 74%. Russia also holds the largest reserves, 44% of the world figure.
Producer log
7 countries listed separately
| Country | Natural industrial diamond mine production 2024 | Natural industrial diamond mine production 2025 | Share of world 2025 | Change on 2024 | Reserves | Share of world reserves |
|---|---|---|---|---|---|---|
| Russia | 16 | 16 | 42% | 0% | 750 | 44% |
| DR Congo | 7 | 7 | 18% | 0% | 150 | 8.8% |
| Botswana | 5 | 5 | 13% | 0% | 250 | 15% |
| Zimbabwe | 5 | 5 | 13% | 0% | 56 | 3.3% |
| South Africa | 3 | 3 | 7.9% | 0% | 87 | 5.1% |
| Angola | 1 | 1 | 2.6% | 0% | 150 | 8.8% |
| United States | 0 | 0 | not available | |||
| Other countries | 1 | 1 | 2.6% | 250 | ||
| World total | 38 | 38 | 100% | 0% | 1,700 | 100% |
Output versus reserves
same commodity, two measures
Natural industrial diamond mine production, 2025
- Russia 42%
- DR Congo 18%
- Botswana 13%
- Zimbabwe 13%
- South Africa 7.9%
- All other countries 5.3%
Reserves (world 1.7 billion carats)
- Russia 44%
- Botswana 15%
- Angola 8.8%
- DR Congo 8.8%
- South Africa 5.1%
- All other countries 18%
Reserves are the part of identified deposits that USGS considers economic to extract now; they change as prices, technology and surveys change. At the 2025 rate, the world reserve figure equals about 45 years of output.
United States
supply, trade and import sources
Net import reliance in 2025, as a percentage of apparent consumption.
Import sources, 2021–24
- China 77%
- South Korea 8%
- Ireland 5%
- Other countries 10%
| Item | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Bort, grit, and dust and powder; natural and synthetic — Production: Manufactured diamond | 132 | 150 | 152 | 159 | 160 |
| Bort, grit, and dust and powder; natural and synthetic — Production: Secondary | 1.20 | 14.4 | 14.0 | 14.9 | 15 |
| Bort, grit, and dust and powder; natural and synthetic — Production: Imports for consumption | 261 | 303 | 264 | 238 | 170 |
| Bort, grit, and dust and powder; natural and synthetic — Production: Exports | 99.1 | 94.0 | 74.0 | 73.3 | 72 |
| Bort, grit, and dust and powder; natural and synthetic — Production: Consumption, apparent | 294 | 374 | 356 | 334 | 270 |
| Stones, natural and synthetic — Production: Manufactured diamond | — | — | — | — | — |
| Stones, natural and synthetic — Production: Secondary | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 |
| Stones, natural and synthetic — Production: Imports for consumption | 0.33 | 0.79 | 0.38 | 0.39 | 0.35 |
| Stones, natural and synthetic — Production: Exports | — | under ½ | under ½ | under ½ | under ½ |
| Stones, natural and synthetic — Production: Consumption, apparent | 0.41 | 0.86 | 0.45 | 0.46 | 0.43 |
| Stones, natural and synthetic — Production: Net import reliance as a percentage of apparent consumption | 80 | 91 | 83 | 84 | 81 |
Source: USGS Mineral Commodity Summaries 2026, Industrial diamond chapter (PDF page 82). How to read these figures.