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

Reference