41. It also provides a source of unusual mineral specimens and rare earth elements ( REE ) extraction. 42. The magnetic medium are typically amorphous R-FeCo thin film ( R being a rare earth element ). 43. The earth element attacks Luna, killing him. 44. Bastn�site and the phosphate mineral monazite are the two largest sources of cerium and other rare earth elements . 45. Rare earth elements are strongly enriched. 46. This is Earth element ruler Saturn. 47. Rare earth elements are popular dopants. 48. The IIG said it did not find data supporting the presence of rhenium or any other rare earth element . 49. Depletion or enrichment of europium in minerals relative to other rare earth elements is known as the europium anomaly. 50. Fire ( red ) which produces earth ( yellow ) is suitable for those born under the earth element .