REE - Rare Earth Elements - Metals, Minerals, Mining, UsesRare Earth Elements (REE) are becoming increasingly important in electronic . see high prices as an opportunity and attempt to develop new sources of supply.rare earth sources,USGS Minerals Information: Rare EarthsMar 30, 2018 . The principal economic sources of rare earths are the minerals . lutetium, the least abundant rare-earth elements at about 0.5 part per million.
rare earth sources