MP Materials, which runs the only American rare earths mine, announced a new $500 million agreement with tech giant Apple on Tuesday to produce more of the powerful magnets used in iPhones as well as other high-tech products like electric vehicles.

Apple’s investment in the mining company MP Materials will also help the tech giant reduce its dependence on China for rare earth metals.

The moves by Apple and the Pentagon are part of a broader U.S. push to nearshore rare earth supply chains. Earlier this year, President Trump proposed annexing Greenland, an autonomous Danish territory estimated to contain $4.4 trillion worth of rare earth reserves. Vice President JD Vance made a surprise visit in support of the plan.