Two of the most commercially important light rare earth elements — cerium for polishing and catalysts, neodymium for permanent magnets.
Cerium: Cerium is critical for glass polishing in semiconductor manufacturing and display technology, and for automotive emission control catalysts.
Neodymium: Neodymium is irreplaceable in EV motors and wind turbines. China controls 85% of global rare earth processing, making supply security a top priority for the U.S. and allies.
Cerium: Cerium is the most abundant rare earth element and is widely used as a polishing compound, catalyst, and in glass manufacturing. Cerium oxide is the standard glass polishing agent for optics and electronics screens. Neodymium: Neodymium is a rare earth element essential for neodymium-iron-boron (NdFeB) permanent magnets — the strongest magnets in the world. These magnets are used in every electric vehicle motor and wind turbine generator.
As tracked by Critical Minerals HQ, Cerium is currently $1.6 USD/kg and Neodymium is $68 USD/kg. The two minerals are quoted in different units (USD/kg vs USD/kg), so see the live price panels above for the most recent figures.
Neither is "better" in absolute terms — each is engineered for different end-uses. Cerium is primarily used for: Glass polishing compounds for optics and screens, Automotive catalytic converter washcoats, UV-blocking glass additives, Petroleum refining fluid catalytic crackers. Neodymium is primarily used for: NdFeB permanent magnets for EV motors, Wind turbine direct-drive generators, Defense guidance systems and sensors, Consumer electronics speakers and hard drives. The right mineral depends on the application.
Cerium and Neodymium are quoted in different units (USD/kg vs USD/kg), so a direct numeric rarity comparison from spot price alone is indicative only. See the indexed 25-year chart on the live page for relative scarcity behavior.
Specific US import-reliance percentages are not in our on-file reference text for either Cerium or Neodymium. See the official USGS Mineral Commodity Summaries for the latest figures.
Cerium top producers (USGS): China, Australia, United States, Russia. Neodymium top producers: China, United States, Myanmar, Australia. The mineral whose first-listed producer accounts for a larger share of global output carries the greater supply-chain concentration risk.
Cerium: Cerium is critical for glass polishing in semiconductor manufacturing and display technology, and for automotive emission control catalysts. Neodymium: Neodymium is irreplaceable in EV motors and wind turbines. China controls 85% of global rare earth processing, making supply security a top priority for the U.S. and allies.