China supplies 69.5% of U.S. imports of Natural Magnesium Carbonate (Magnesite), across 11 countries (year to date through August 2026).
HHI 5,124 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
11 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | China | $208K | 68.6% | +27.4% | 0.0% |
| 2 | Japan | $41K | 13.5% | -31.0% | 0.0% |
| 3 | Bulgaria | $35K | 11.4% | -- | 0.0% |
| 4 | Brazil | $20K | 6.5% | +18.1% | 0.0% |
| 5 | India | -- | 0.0% | -- | -- |
| 6 | South Korea | -- | 0.0% | -- | -- |
| 7 | Taiwan | -- | 0.0% | -- | -- |
| 8 | Israel | -- | 0.0% | +137.0% | -- |
| 9 | Norway | -- | 0.0% | -- | -- |
| 10 | Greece | -- | 0.0% | -90.5% | -- |
| 11 | Canada | -- | 0.0% | +1094.5% | -- |
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.