7 Nov 2025
Regulatory Change for Boron in United States
The U.S. Federal Register published the 2025 Critical Minerals List, adding boron to the list, thereby elevating its policy status and potential support.
United States trade
Other Borates
Market intelligence
Relevant Events
1 Jul 2025
Project Delay for Boron in United States
An Australian mine developer postponed construction of its Nevada boron project until March 2026 due to an 80% drop in lithium prices, delaying boron by‑product production.
2024
Regulatory Change for Boron in United States
The National Defense Authorization Act for fiscal year 2024 included an amendment to study boron supply chains, potentially influencing U.S. policy and investment in boron-related industries.
2024
Regulatory Change for Boron in United States
The Under Secretary of Defense for Acquisition and Sustainment was expected to complete the boron supply chain study by Q1 2024, providing guidance on future U.S. defense-related boron requirements.
1 Apr 2023
Mine Opening for Boron in United States
Construction began on a California boron mine project in April, aimed at producing specialty boron products for decarbonization and food security industries.
1 Jan 2023
Mine Opening for Boron in United States
The Nevada-based boron project is anticipated to begin production in 2023, marking the opening of a new boron mine.
31 Dec 2021
Processing Startup for Boron in United States
An Australian‑British multinational mining corporation completed a lithium demonstration plant at its Boron Mine, producing battery‑grade lithium from waste rock and demonstrating processing potential on boron mine resources.
1 Jan 2021
Mine Opening for Boron in United States
The California-based boron project is expected to commence production in 2021, opening a new boron mine.
31 Dec 2015
Tariff Change for Boron in United States
U.S. ad valorem tariffs on boric acids (1.5%) and refined borax (0.3% for anhydrous, 0.1% for non-anhydrous) were effective December 31, 2015, affecting import costs and trade flows.
2015
Regulatory Change for Boron in United States
A 14% depletion allowance was applied to borax, both domestically and abroad, altering reserve accounting and mining economics.
2006
Processing Expansion for Boron in United States
Rio Tinto increased capacity for zinc borate production in 2006 to meet growing demand, expanding its U.S. boron‑derived product output.
1 Feb 2003
Mine Closure for Boron in United States
The calcium borate mine in Newberry Springs, California, has been idle since February 1 2003, reducing U.S. domestic boron production.
Dec 1997
Ownership Change for Boron in United States
IMC Global Inc. acquired Harris Chemical Group Inc., consolidating ownership of NACC and related assets.
1 Jan 1997
Mine Expansion for Boron in United States
The only domestic underground boron mine increased its production during 1997, indicating a mine expansion that raised domestic output.
1 Jan 1997
Processing Expansion for Boron in United States
The California company introduced a tailings reclamation process that recovers roughly 10% boron oxide, improving production efficiency and restoring 350 hectares of land over 20 years.
1 Jan 1997
Processing Startup for Boron in United States
A new in-situ borate project began producing synthetic calcium borate for testing in the glass industry, marking a processing startup that could expand product offerings.
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