Botswana supplies 64.4% of U.S. imports of Nonindustrial Diamonds, across 10 countries (year to date through September 2026).
HHI 4,593 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
10 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Botswana | $807K | 67.3% | -52.6% | 0.0% |
| 2 | Namibia | $271K | 22.6% | -71.3% | 0.0% |
| 3 | South Africa | $71K | 5.9% | -88.9% | 12.5% |
| 4 | Canada | $26K | 2.2% | -95.5% | 10.0% |
| 5 | Lesotho | $26K | 2.1% | -99.9% | 0.0% |
| 6 | Tanzania | -- | 0.0% | -98.1% | -- |
| 7 | Democratic Republic of the Congo | -- | 0.0% | -94.3% | -- |
| 8 | Angola | -- | 0.0% | -88.0% | -- |
| 9 | India | -- | 0.0% | +5.5% | -- |
| 10 | Belgium | -- | 0.0% | -- | -- |
Duty is the duty Census calculated on this month's imports for consumption from each country, as a share of their customs value. It applies the rates in force, additional duties such as Section 301, 232 and IEEPA included and claimed trade-agreement preferences netted out, so it is an observed rate rather than a statutory one. It is an estimate, not duty collected: antidumping and countervailing duties, fees and later refunds are not in it. YoY compares year-to-date value with the same months last year.