2528.00.00.10/Colemanite Ore/Germany

Colemanite Ore from Germany

Colemanite is a naturally occurring white to colorless calcium borate mineral (Ca2B6O11·5H2O) mined primarily from evaporite deposits in California and Turkey. It falls under HTS 2528.00.0010 as a natural calcium borate, unprocessed except for basic concentration, used as a source of boron in various industries. This statistical suffix specifically covers calcium borate variants like colemanite without chemical separation from brine.

Duty Rate — Germany → United States

10%

Rate breakdown

9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter

Calculate with your customs value Verify with the Tariff Assistant

Import Tips

• Verify mineral composition via assay certificates to confirm calcium borate content exceeds boron thresholds; ensure no brine separation processing to avoid reclassification

• Obtain mining origin documentation for potential preferential tariff treatments under USMCA or similar agreements

• Watch for contamination with other salts that could trigger Chapter 28 chemical headings