Critica Limited’s Jupiter Rare Earth Project pilot plant has delivered a significant beneficiation breakthrough, upgrading feed to a ~3% TREO intermediate concentrate with strong magnet rare earth recoveries and substantial mass rejection.
- Approximately 14× upgrade to ~3% TREO concentrate
- About 95% of feed mass rejected, concentrating REEs into 5%
- Strong recoveries of key magnet rare earths (Nd, Dy, Pr, Tb)
- Results support lower downstream processing volumes and costs
- Findings feed directly into ongoing Sedgman Scoping Study
Pilot Plant Breakthrough Boosts Concentrate Grade
Critica Limited (ASX:CRI) has taken a major step forward at its Jupiter Rare Earth Project in Western Australia, delivering a roughly 14-fold upgrade of feed material to an intermediate concentrate grading about 3% Total Rare Earth Oxides (TREO). This upgrade, achieved through pilot plant optimisation, represents a substantial leap from the original feed grade of around 0.21% TREO and concentrates the rare earth minerals into just 5% of the original mass.
The beneficiation process achieved approximately 95% mass rejection, effectively removing the bulk of non-valuable material before downstream processing. This reduction in processing volume is a critical factor in lowering both operating and capital costs, reinforcing the project's potential for a scalable and financeable flowsheet.
Strong Magnet Rare Earth Recoveries Maintained
Importantly, the pilot plant results maintained robust recoveries of magnet rare earth elements, which are essential for high-performance permanent magnets used in electric vehicles, renewable energy, and defence technologies. Neodymium (Nd₂O₃) and dysprosium (Dy₂O₃) recoveries both exceeded 74%, while praseodymium (Pr₆O₁₁) and terbium (Tb₄O₇) showed recoveries of 69.3% and 65.9%, respectively.
Critica’s CEO Jacob Deysel emphasised the significance of these outcomes, noting the consistency and quality of the concentrate as exactly what a scalable beneficiation pathway requires. The results build on earlier improvements reported in April 2026, including an 81% magnet rare earth recovery milestone, and complement recent high-purity Mixed Rare Earth Oxide (MREO) production efforts. This progression supports the company’s transition from explorer to developer as it advances its Scoping Study with Sedgman.
Implications for Project Economics and Development
By concentrating rare earth elements into a smaller mass fraction, Critica is effectively streamlining the downstream hydrometallurgical and refining processes, which are typically cost-intensive. The ~95% mass rejection achieved means less material to process, reducing energy consumption and reagent use, and potentially accelerating project timelines.
The pilot plant composite sample, weighing about 3.7 tonnes, was carefully selected from 117 drill holes within the Jupiter resource area and processed at GAVAQ Solutions in Vietnam. Assaying was conducted by ALS Geochemistry in Perth, confirming the concentrate grades and recovery metrics. The beneficiation flowsheet involved grinding, scrubbing, low-intensity magnetic separation to remove iron minerals, followed by flotation to separate the rare earth minerals.
These beneficiation advances directly inform the ongoing Scoping Study, which integrates metallurgical data with resource and engineering inputs to refine project economics and development pathways. The study is being progressed with Sedgman, a respected engineering firm, and will incorporate these latest results to optimise process design and cost projections.
Next Steps in Metallurgical Testwork and Product Qualification
Critica is continuing metallurgical test programs aimed at further improving concentrate grade and recovery, as well as downstream processing efficiency. Additional bulk samples are being processed to support optimisation and produce product samples for qualification with potential offtakers.
The company plans to produce final Mixed Rare Earth Oxide (MREO) samples for product qualification, a key step toward commercialisation. This follows earlier milestones where Critica produced commercial-grade MREO products reaching approximately 97% TREO purity, underpinning its mine-to-magnet strategy amid rising demand from AI, electric vehicles, and renewables sectors.
These developments dovetail with Critica’s broader project advances, including resource drilling and previous beneficiation recovery improvements, reinforcing momentum toward project development and potential financing discussions. The pilot plant progress complements Critica’s ongoing efforts to validate a low-cost, scalable rare earth supply chain in Australia, a critical strategic objective given global supply constraints and geopolitical sensitivities around rare earth sourcing.
Critica’s beneficiation gains echo the company’s recent boosts to magnet rare earth recovery and build on its high-purity MREO production milestones, illustrating steady technical progress across the value chain.
Bottom Line?
Critica’s pilot plant results mark a pivotal step in refining Jupiter’s beneficiation pathway, but the real test lies ahead in scaling operations and securing product qualification to underpin project financing.
Questions in the middle?
- How will further beneficiation optimisation impact final concentrate grades and recoveries?
- What timelines are anticipated for completing the Scoping Study and securing offtake agreements?
- How will Critica’s beneficiation advances influence its competitive position in the global rare earth sector?