Botswana supplies 50.7% of U.S. imports of Industrial Diamonds, Unworked or Simply Sawn, Cleaved…, across 7 countries (year to date through August 2026).
HHI 3,480 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
7 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Botswana | $131K | 82.3% | +118.0% | 0.0% |
| 2 | Democratic Republic of the Congo | $16K | 9.9% | +85.2% | 0.0% |
| 3 | South Africa | $12K | 7.8% | -67.5% | 12.5% |
| 4 | Canada | -- | 0.0% | -85.8% | -- |
| 5 | Angola | -- | 0.0% | +293.3% | -- |
| 6 | India | -- | 0.0% | -85.8% | -- |
| 7 | Australia | -- | 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.