Germany supplies 53.9% of U.S. imports of Synthetic Diamonds, Unworked or Simply Sawn/Roughly Shaped, across 12 countries (year to date through August 2026).
HHI 3,596 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
12 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Germany | $201K | 69.6% | -30.0% | 10.0% |
| 2 | Netherlands | $26K | 9.1% | -16.7% | 10.0% |
| 3 | India | $25K | 8.5% | -67.5% | 13.0% |
| 4 | China | $23K | 8.0% | -50.2% | 23.0% |
| 5 | United Kingdom | $11K | 3.8% | -87.9% | 13.0% |
| 6 | Canada | $3K | 1.0% | -37.5% | 0.0% |
| 7 | Australia | -- | 0.0% | +154.8% | -- |
| 8 | Turkey | -- | 0.0% | -95.3% | -- |
| 9 | Israel | -- | 0.0% | +187.5% | -- |
| 10 | United Arab Emirates | -- | 0.0% | -- | -- |
| 11 | Thailand | -- | 0.0% | +14.8% | -- |
| 12 | Singapore | -- | 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.