Rees are commonly divided into light rare earth elements (lrees) and heavy rare earth elements (hrees) based on their atomic weight and mineral associations. The rare-earth elements (ree), also called rare-earth metals, or rare earths, are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. Rare earth elements (rees), which comprise of only 17 elements from the entire periodic table, play a critical role to our national security, energy independence, environmental future, and economic growth.

Rare earth elements (ree) are becoming increasingly important in electronic devices used in the defense, alternative energy, and communications industries. Minable deposits of rees are found in Ò€¦ Program portfolio feasibility of recovering rare earth elements - critical minerals and materials program this portfolio houses domestic ree and cm field prospecting information related to: