Solvay Viridis Rare Earth Supply Deal Strengthens Europe’s Magnet Materials Chain

Solvay

Solvay Viridis rare earth supply agreement will give the Belgian chemicals producer a new long-term feedstock source for its La Rochelle processing plant in France. The deal will begin in 2028 and cover material from Viridis Mining and Minerals’ Colossus project in Brazil.

Solvay Viridis rare earth supply is strategically important because the feedstock includes neodymium, praseodymium, dysprosium and terbium, all critical to high-performance permanent magnets. The agreement also covers samarium, gadolinium and yttrium.

Solvay Viridis rare earth supply strengthens Europe’s effort to build a more complete rare earth value chain outside China. Solvay will process the Brazilian feedstock into high-purity rare earth oxides at La Rochelle.

The deal links upstream resources in Brazil with European separation and downstream magnet customers, creating a more diversified industrial route for strategic materials.

Colossus Feedstock Supports European Rare Earth Processing

Viridis is developing the Colossus ionic adsorption clay project in Minas Gerais, Brazil. The project has a measured and indicated resource of 329mn t grading 659ppm magnetic rare earth oxide.

Ionic adsorption clay deposits are strategically important because they can contain valuable heavy rare earths alongside light rare earths. Dysprosium and terbium are particularly important for high-temperature permanent magnet applications.

Solvay’s La Rochelle plant gives Europe an established processing base for converting these materials into high-purity oxides. That processing stage remains one of the biggest bottlenecks outside China.

The inclusion of samarium, gadolinium and yttrium also broadens the commercial value of the supply agreement. These elements serve applications across magnets, aerospace, electronics, energy and advanced materials.

For Viridis, the agreement provides a downstream route into a major European processor. For Solvay, it strengthens feedstock diversification and reduces reliance on a narrower group of suppliers.

La Rochelle Builds Links to Magnet Manufacturing

Solvay inaugurated the La Rochelle facility in April 2025 with the goal of supplying 30% of European rare earth demand by 2030. Securing feedstock is essential if the plant is to reach that scale.

The company has already built a downstream customer relationship with US magnet producer Noveon Magnetics. Solvay agreed in November 2025 to begin supplying Noveon with rare earth oxides from 2026.

This creates a clearer value chain from mineral resource to separated oxide and then to permanent magnet production. That integration is critical for customers seeking reliable non-China materials.

Europe’s rare earth strategy increasingly depends on exactly this type of linkage. Mining projects alone cannot solve supply risk unless they connect with separation, metallization, alloying and magnet manufacturing.

The Viridis agreement therefore strengthens La Rochelle’s role as a processing hub. If Colossus advances successfully, Brazilian feedstock could become an important part of Europe’s diversified magnet materials supply.

The Metalnomist Commentary

The Solvay-Viridis deal shows that Europe’s rare earth strategy is moving from processing capacity toward feedstock security. La Rochelle’s long-term competitiveness will depend on securing diverse sources of NdPr and heavy rare earths that can consistently feed magnet customers.