The United States is keen to secure sources beyond its main global rival, China, which last year accounted for more than 70% of world rare earth production.
Move marks the first time a US government agency has included copper on one of its official “critical” lists, following the examples of the European Union, Japan, India, Canada, and China.
Agreement will provide Graphex with a diverse supply of raw materials in line with its plans to bring domestic processing facilities online to supply automakers and battery gigafactories.