Praseodymium
Praseodymium, just 4% of the Lanthanide content of Bastnasite, is a common coloring pigment. Along with Neodymium, Praseodymium is used to filter certain wavelengths of light. Praseodymium is used in photographic filters, airport signal lenses, and welder’s glasses. Its color allows production of various pigments used in coloring products such as ceramic tile and glass. Vibrant yellow ceramic tiles and glasses most likely contain Praseodymium and certain premium quality mirrors and lenses also depend on Praseodymium.

As part of an alloy, Praseodymium is used in permanent magnet systems designed to make smaller and lighter motors. Praseodymium is also used in automobile and other internal combustion engine pollution control catalysts.