RARE EARTH ELEMENTS
# ID SY Name $Pound Usage
1 58 Ce Cerium 3 polishing agent in glass manufacturing, acting as a decolorizer, and is also a key component in "flint" for cigarette lighters
2 66 Dy Dysprosium 677 alloying element in the production of powerful neodymium-based permanent magnets
3 68 Er Erbium 58 production of optical fibers for telecommunications
4 63 EU Europium 69 nuclear reactors, light bulbs, and medical imaging
5 64 Gd Gadolinium 63 MRI scans to help detect abnormal tissue and other conditions
6 67 Ho Holmium 126 powerful magnetic fields in devices like MRI machines, and as a component in nuclear reactor control rods due to its ability to absorb neutrons
7 57 La Lanthanum 11 used in medicine to treat high phosphate levels in the blood
8 71 Lu Lutetium 1,418 cancer treatment, petroleum refining, and dating meteorites
9 60 Nd Neodymium 2 Magnets, Electronics, Glass, Lasers, Cryocooler applications, Safety glasses, Medical imaging, Magnotherapy
10 59 Pr Praseodymium 2 alloying agent to create high-strength metals for aircraft engines
11 61 Pm Promethium 1,014,126 pacemakers, guided missiles, radios
12 62 Sm Samarium 31 powerful, high-temperature resistant "samarium-cobalt" magnets
13 21 Sc Scandium 579 aerospace, lighting, sports equipment
14 65 Tb Terbium 1,451 green phosphor in fluorescent lamps, television screens, and computer monitors
15 69 Tm Thulium 6,614 as a green phosphor in fluorescent lamps, television screens, and computer monitors
16 70 Yb Ytterbium 68 Laser systems, atomic clocks, and as an additive to improve the strength of certain steels
17 39 Y Yttrium 35 LED lights, lasers, microwave filters, high-temperature superconductors, and certain medical applications
T O T A L 1,025,332  

Reference