Brazil’s Colossus: Viridis Mining and the Future of Rare Earth Investment in South America

Brazil’s Colossus: Viridis Mining and the Future of Rare Earth Investment in South America

Introduction:

The global demand for rare earth elements (REEs) is surging, driven by the clean energy transition and the proliferation of high-tech devices. As nations seek to diversify their supply chains and reduce reliance on China, Brazil is emerging as a key player in the rare earth market. Holding the world’s second-largest reserves, Brazil is poised to become a major supplier of these critical minerals. One company at the forefront of this development is Viridis Mining and Minerals, with its Colossus Ionic Adsorption Clay (IAC) project. Viridis Mining is strategically positioned to capitalize on this opportunity, potentially transforming South America’s rare earth investment landscape.

The Colossus Project: A Disruptive Rare Earth Opportunity

Viridis Mining acquired 100% REE rights to the Colossus IAC Project in August 2023. Located in Minas Gerais, Brazil, the Colossus project comprises 228.62 km² of licenses within the Poços De Caldas Alkaline Complex, known for some of the highest-grade IAC intercepts globally. The company has since pursued an aggressive exploration program, positioning Colossus to potentially become among the highest-grade IAC projects in the world.

In August 2025, Viridis unveiled an initial reserve estimate of more than 200 million tonnes at Colossus, underpinning a potential high-grade rare earth mine with a potential life of 40 years. The total tonnage — derived solely from measured and indicated resources — more than doubles the reserve estimate of 98.5 million that underpins its current prefeasibility study, but at a lower MREO grade (936 ppm before). Still, it significantly extends the mine plan from 20 years to at least 40 years. At grades of 2,640 parts per million (ppm) in total rare earth oxides (TREOs) and 740 ppm in magnetic rare earth oxide (MREOs), this reserve reaffirms Colossus as a global leading IAC project, the Australian miner says.

Viridis expects to start production at its rare earth project in Brazil in 2028. With a projected investment that could reach US$400 million (mn), the Australian company Viridis is moving forward with the development of the Colossus rare earth project in Poços de Caldas, in the Brazilian state of Minas Gerais.

Why Brazil? Untapped Potential and Strategic Significance

Brazil holds 23% of global rare earth reserves, second only to China. However, Brazilian production remains at an early stage, accounting for only 1% of the global market. This vast untapped potential, combined with increasing geopolitical tensions and supply chain concerns, has made Brazil a hotspot for rare earth investment.

Several factors contribute to Brazil’s attractiveness:

• Abundant Resources: Brazil possesses the world’s second-largest reserves of rare earth elements (REEs).
• Favorable Geology: Recent geological assessments have revealed that Brazil’s rare earth deposits contain favorable mineralogy for economic extraction.
• Strategic Location: Many projects are located near existing industrial infrastructure, including transportation networks, power supplies, and skilled workforces.
• Government Support: The Brazilian government has mobilized substantial financial incentives to stimulate the sector, including nearly $1 billion earmarked through the Brazilian Development Bank (BNDES) and the government funding agency Finep.
• ESG Advantages: Brazil has a significant advantage in the development of the rare earth sector, which is linked to sustainability. 90% of Brazil’s energy matrix is renewable.

Viridis Mining: A First Mover Advantage

Viridis Mining is positioning itself to be a first mover in Brazil’s rare earth sector. The company is focused on developing sustainable supply chains for critical minerals such as rare earths, essential for clean energy technologies.

Viridis has been selected by the Brazilian Development Bank (BNDES) and the Funding Authority for Studies and Projects (FINEP) to receive substantial funding for its Colossus Project in Brazil. The project is being developed by the company and its Viridion joint venture (JV). It is expected to develop sustainable supply chains for critical minerals such as rare earths.

Viridis and Viridion’s plans align with this initiative, part of the New Industry Brazil policy aimed at enhancing Brazil’s scientific and technological capabilities. The funding will expedite the development timelines for the Colossus Project, enabling Viridis to deliver high-purity rare earth oxides to Latin America’s sole magnet manufacturer, IXR, reinforcing the strategic partnership between the two companies.

Navigating the Challenges: Regulations, Environment, and Community

While Brazil offers significant opportunities for rare earth investment, it’s essential to navigate the challenges:

• Regulatory Framework: Brazil’s legal framework governing critical minerals and rare earth elements is anchored in the Brazilian Mining Code, further regulated by Decree No. 9,406/2018. The National Mining Agency (ANM) is responsible for granting exploration authorizations, issuing mining concessions, and supervising mining activities.
• Environmental Concerns: Scaling up the extraction of rare earths could lead to increased conflicts in several Brazilian states. It is important to ensure that mining activities adhere to high environmental, social and governance (ESG) standards and also seek ways to generate tangible benefits for local communities.
• Community Engagement: Strong community engagement is crucial for the success of rare earth projects in Brazil. Viridis Mining’s engagement with the municipality of Poços de Caldas has been vindicated with early municipal endorsements, including a Certificate of Regularity for Land Use and Occupation.

The Future of Rare Earth Investment in South America

Brazil’s rare earth sector is poised for significant growth, with investments expected to reach $2.17 billion during 2025-29, a 49% increase compared to the estimated investments for 2024-28. Viridis Mining is at the forefront of this development, with its Colossus project representing a significant opportunity for investors seeking exposure to the critical minerals sector.

The company has secured international financing support for Colossus project in Brazil. Rafael Moreno states that the company recently received a letter of interest from Export Development Canada for up to $100 million in debt financing, as well as support from Bpifrance Assurance Export, the French credit export agency, highlighting a wave of confidence from export credit agencies.

Viridis Mining and Minerals has secured approval of its Environmental Impact Assessment and Report and been granted the key Preliminary License by the State of Minas Gerais for its Colossus Rare Earth Project, formally confirming the project’s environmental feasibility and design.

Conclusion:

Brazil’s Colossus project, led by Viridis Mining, represents a compelling investment opportunity in the rare earth sector. With its high-grade resources, strategic location, government support, and commitment to ESG principles, Viridis is well-positioned to capitalize on the growing demand for rare earth elements and transform South America’s rare earth investment landscape. As Brazil continues to develop its rare earth industry, it has the potential to become a major player in the global supply chain, offering a secure and sustainable source of these critical minerals.