Apple has committed $500 million to buying recycled rare earth magnets from MP Materials, a mining company with a major manufacturing hub in far north Fort Worth.

MP Materials is a US producer that just last week secured backing from the Pentagon, and will now be working with the biggest name in consumer technology.

Apple (AAPL, Financials) is investing $500 million to secure rare earth magnets from MP Materials (MP, Financials), doubling down on its U.S. supply chain as pressure mounts from President Donald Trump to bring iPhone production stateside.