Neodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air.
Neodymium compounds were first commercially used as glass dyes, and they remain a popular additive in glasses. Neodymium is also used with various other substrate crystals, such as yttrium aluminum garnet in the Nd:YAG laser. This laser usually emits infrared at a wavelength of about 1064 nanometers. The Nd:YAG laser is one of the most commonly used solid-state lasers. Another chief use of neodymium is as a component in the alloys used to make high-strength neodymium magnets—powerful permanent magnets.