Mineral and applications technology company Rare Earth Salts (RES) has signed a five-year commercial agreement with significant buyer of retorted compact fluorescent lightbulb phosphor powder, Rare Earth Recovery Sciences (RERS), to produce separated rare earth oxides in the US. RERS would produce a rare earth concentrate in collaboration with Lighting Resources, using technology provided by RES. The concentrate would be shipped to RES’s Nebraska facility for separation and purification.