Rare Earth Concentrates
Covered in 2 MetalsCost.com News Intelligence articles, most recently on October 6, 2026.
Overview
Rare earth concentrate is the mineral product that comes off a mine's processing plant before any chemical separation happens — crushed, ground ore that's been upgraded through flotation, magnetic and gravity separation into a concentrate typically carrying 30% to 70% total rare earth oxides, still bound up as a mix of every rare earth element the ore contained. It isn't usable directly in magnets, catalysts or any end product; it's an intermediate that has to be chemically decomposed and separated before individual elements become available.
How It's Made
The dominant deposit minerals are bastnaesite (a rare earth fluorocarbonate) and monazite (a rare earth phosphate that also carries thorium and uranium, which is why standalone monazite mining is restricted in China on radiological grounds). Concentrate produced at mines like Bayan Obo in China, Mountain Pass in the US, and Mount Weld in Australia is then processed by oxidation roasting with acid leaching, caustic decomposition, or sulfuric acid roasting to break the minerals down ahead of solvent-extraction separation.
Sources
- Rare earth concentrate composition and processing route — Rare Earth Separation & Processing: Solvent Extraction, Ion Exchange & China's Dominance (2025)
Coverage
Greenland Approves the Mine Plan for Critical Metals' Tanbreez Rare Earth Project
Greenland has approved the mining and closure plans for Critical Metals' Tanbreez project, one of the larger undeveloped heavy rare earth deposits outside China. The company still needs several permits and a financial security before it can start building the mine.
Canada Aims to Cut Japan's 72% Reliance on Chinese Rare Earths
China still supplies about 72% of Japan's rare earth imports, even after a 2025 export halt. Canada, sitting on major reserves but zero production, is emerging as a potential partner.
