One of the World’s Largest Ionic Clay Rare Earth Reserves
Colossus is underpinned by a 200.1Mt Ore Reserve containing approximately 579kt TREO, supporting a 25-year mine life with an estimated reserve inventory extending to approximately 41 years.
With substantial Proved Ore Reserves in the early production years and significant expansion potential beyond the DFS case, Colossus has the scale, confidence and longevity expected of a globally significant rare earth development.
Built on a True Ionic Clay Deposit
Colossus is a genuine Ionic Adsorption Clay deposit, enabling rare earth extraction without the crushing, grinding and beneficiation circuits required by hard rock operations.
Shallow, free-dig mineralisation supports low-cost mining, while the project’s exceptional magnetic rare earth concentrations provide a foundation for industry-leading economics.
ESG Embedded From Day One
Colossus has been designed around progressive rehabilitation, non-hazardous residue backfilling and a Zero Liquid Discharge philosophy.
The project avoids conventional tailings storage facilities and incorporates extensive recycling of water and process reagents, reducing environmental footprint while supporting long-term sustainability outcomes.
Economics That Stand Apart
The DFS confirms exceptional project economics, delivering a post-tax IRR of 36.4%, post-tax NPV8 of US$1.36 billion and rapid capital payback.
With forecast operating costs in the lowest quartile globally, Colossus is positioned to generate strong margins and robust cash flows across commodity price cycles.
Demonstration Plant Reducing Execution Risk
Colossus is one of the few rare earth projects globally to have successfully operated a continuous demonstration plant at semi-industrial scale.
The plant continues to deliver recoveries at or above DFS assumptions, validating the flowsheet, reducing scale-up risk and providing a strong foundation for project financing and execution.
Execution Is Already Underway
Viridis has intentionally advanced engineering, procurement, infrastructure and financing activities ahead of Final Investment Decision.
Grid connection works have commenced, EPCM kicked-off, long-lead procurement activities are progressing and project delivery planning is well advanced, positioning Colossus for a rapid transition into construction.
Creating Brazil’s Rare Earth Industry
Colossus is designed to produce a high-value Mixed Rare Earth Carbonate product that enhances magnetic rare earth concentration and value.
Through Viridion and strategic downstream partnerships, Viridis is pursuing a broader vision of establishing a rare earth chemical and refining industry in Brazil, supporting industrialisation, supply chain security and long-term value creation.
