If the US wants more rare earths, it needs to tackle refining / What rare earth elements are and why they matter / Not Just 'Rare Earths': U.S. Gets Many Critical Minerals From China / Unappreciated Rhabdophane is the forgotten host of rich rare-earth elements / The global race for rare earth materials is on, and the U.S. is losing it / The US-Ukraine mineral deal: A look at rare earths, their use and purposes / US, Ukraine may sign deal on rare-earth materials on Feb. 22 -- WSJ / What to know about Ukraine's controversial rare earth minerals / What are rare earth elements, and why does Trump want them from Ukraine? / After 100 years of harvesting coal, SCCL set to mine rare earths, focus on green energy