Rare Earth Oxides vs Metals: The Forms Between Mine and Magnet
Rare earth oxides and rare earth metals are different steps in the same chain. Separation plants produce oxides, which are the main traded product and the basis for most published prices. Making magnets requires turning those oxides into metals and alloys, an energy-intensive step that is concentrated in China.
| Form | Examples | How it is made | What it is used for |
|---|---|---|---|
| Oxide | Nd₂O₃, Dy₂O₃, NdPr oxide | Final product of separation: precipitated from solution and calcined to a powder | Traded as the main benchmark product; used directly in catalysts, glass, polishing and phosphors; feedstock for metal |
| Metal | Nd metal, NdPr metal, Dy metal | Oxide reduced by molten-salt electrolysis (mainly for Nd and Pr) or by reaction with calcium (common for Dy, Tb and Sm) | Input for magnet alloys and specialty alloys |
| Alloy | NdFeB alloy, DyFe alloy | Metal melted with iron and other elements, then strip-cast into flakes | Direct feedstock for magnet makers |
| Magnet | Sintered or bonded NdFeB | Alloy milled to powder, pressed in a magnetic field and sintered, or bonded with polymers | Motors, generators, electronics |
Why Rare Earth Metals Cost More Than Oxides
Rare earth metals cost more than oxides because removing the oxygen takes electricity or reactive chemicals, specialist furnaces and careful handling, since the metals oxidise in air. Some material is also lost along the way. Published prices are usually for oxides, so check which form a price refers to; see how rare earth pricing works.
Why Metal-Making Matters for Supply Security
Separating oxides outside China is not enough to build an independent magnet supply chain. Oxides still have to be converted into metals and alloys, and few plants outside China do this today. That is why projects such as MP Materials' metal and magnet plant in Texas, Neo Performance Materials' metal plant in Thailand and the Korean Metals Plant are important parts of the non-China supply chain.
Oxides vs Metals FAQ
What is the difference between rare earth oxide and metal?
A rare earth oxide is the powder that separation plants produce, with the rare earth bonded to oxygen. A rare earth metal is made by stripping out that oxygen through electrolysis or chemical reduction, which takes more energy and specialist equipment, so metals cost more than oxides.
Why do magnet makers need rare earth metals?
Magnet makers need rare earth metals because NdFeB magnets are made by melting neodymium, praseodymium and other metals with iron and boron. Oxides cannot be used directly in the alloy.
Who makes rare earth metals outside China?
Rare earth metal production outside China is small. Producers include Neo Performance Materials in Thailand, the Korean Metals Plant now owned by Energy Fuels, and MP Materials, which makes NdPr metal for its Texas magnet plant.