https://www.reuters.com/article/us-usa-china-rareearth-explainer/explainer-chinas-rare-earth-supplies-could-be-vital-bargaining-chip-in-u-s-trade-war-idUSKCN1T00EK

Rare earth elements are used in a wide range of consumer products, from iPhones to electric car motors, as well as military jet engines, satellites and lasers.