Apple has announced a $500 million investment in MP Materials, a rare earth mining company based in the US. With the deal, the two companies will partner on the development of a rare earth recycling line in Mountain Pass, California, allowing Apple to use reprocessed electronics and scrap material to build its products.

Apple said on Tuesday it would invest $500 million into rare earths mine operator MP Materials, as the iPhone maker seeks to localize its mineral supply chain. The investment is part of a broader push to bring the production of its coveted iPhones to the United States and boost U.

The company has reportedly promised to commit $500 million in US rare earth supplies for iPhones, iPads, Macs — and everything else.