Neodymium is displayed at the Inner Mongolia Baotou Steel Rare-Earth Hi-Tech Co. factory in Baotou, Inner Mongolia, China.Nelson Ching | Bloomberg | Getty ImagesMining firm Rare Earths Norway says it has discovered Europe's largest proven deposit of highly prized rare earth elements, potentially reflecting a watershed moment for both the Nordic country and the broader region.One of the few deposits not owned or controlled by China, the discovery of continental Europe's largest rare earths deposi...