Some of the most coveted metals on the planet are not just expensive, they are almost unimaginably scarce in Earth's crust ...

Rare earth elements are used to build essential components of high technology, including phones, computers, cars, and weapons components. China is the largest source of rare earth elements in the ...

There are 17 rare earth elements (REEs) in all — 15 lanthanides plus yttrium and scandium. It's a fairly diverse group, with each rare earth mineral having different applications, pricing and ...