21. Rare Earth continues to perform at corporate events and on the oldies circuit.22. Phosphors are often transition metal compounds or rare earth compounds of various types. 23. He began exploration for applications to which the rare earths might be put. 24. The greater strength of rare earth magnets is mostly due to two factors. 25. Fiberoptic amplifiers are based on optical fibers doped with rare earths . 26. Sampson had played previously in another power trio, Rare Earth label. 27. Nuclear reprocessing is another potential source of rare earth or any other elements. 28. Where present, rare earth metals tend to associate with phosphate minerals. 29. New Mexico is a Motown Records, " Rare Earth Records ". 30. The rare earth ions are then selectively washed out by suitable complexing agent.