12 Things You Didn’t Know About Rare Earth Metals

12 Things You Didn’t Know About Rare Earth Metals 1 They’re Not That Rare. Most of the rare earth metals really aren’t that rare. Cerium (Ce) is the most abundant rare earth metal, followed by Lanthanum (La), and then Neodymium (Nd). Cerium, Lanthanum and Neodymium are all more abundant than Lead (Pb). 2 It’s actually [...]