Critica has produced high-purity mixed rare earth oxide and iron concentrate samples from its Jupiter project, giving potential counterparties physical products to evaluate. The milestone follows flowsheet improvements including stronger recovery, higher concentrate grades and lower sulphuric acid consumption, but commercial specifications and project economics remain unresolved.
- 98.2% TREO MREO sample with 28.4% MagREO
- 64.1% Fe magnetite concentrate sample
- Approximately 81% MagREO recovery through beneficiation
- Approximately 30% reduction in sulphuric acid consumption
- Jupiter and Mt Lindsay Scoping Studies targeted for Q3 2026
Critica Limited (ASX:CRI) has moved Jupiter’s rare earth project from laboratory performance towards commercial evaluation, producing physical samples of mixed rare earth oxide and a potential iron by-product for discussions with prospective offtake and strategic counterparties.
High-Purity MREO Sample Supports Product Evaluation
The latest mixed rare earth oxide sample graded 98.2% total rare earth oxides, with 28.4% of that content comprising the four magnet rare earth oxides: neodymium, praseodymium, dysprosium and terbium. The analysis included 21.2% neodymium oxide, 5.70% praseodymium oxide, 0.80% dysprosium oxide and 0.23% terbium oxide.
Critica said the product specifications are not yet final. Grade ranges remain subject to product qualification and commercial discussions, meaning the sample demonstrates product quality but does not establish a binding customer specification or offtake agreement. A further mixed rare earth carbonate sample is still in production; the company has previously demonstrated MREC at approximately 58% TREO.
Iron Concentrate Adds a Second Product Option
Jupiter’s flowsheet has also produced a high-grade magnetite concentrate grading 64.1% iron, with 2.31% silica, 1.08% alumina, less than 0.02% sulphur and less than 0.07% phosphorus. Critica described the material as a potential by-product, rather than a defined revenue stream, and said its contribution to the broader development case is being assessed through the Jupiter Scoping Study.
The iron result sits within a wider range from testwork that produced concentrate grades of 54.3% to 64.1% iron, with corresponding mass pulls of 5.4% and 1.3%. Further work is under way to optimise the balance between concentrate grade and mass recovery. That trade-off will matter when the project’s economics are tested beyond the production of a laboratory or pilot-scale sample.
Flowsheet Improvements Reduce Technical Pressure
Over the past year, Critica reports approximately 81% recovery of magnet rare earth oxides through beneficiation, an approximately 14-fold upgrade to a concentrate of about 3% TREO, and around 95% mass rejection before downstream processing. The hydrometallurgical circuit has also cut sulphuric acid consumption by approximately 30%.
Those figures describe meaningful process improvements, but they remain part of an evolving development programme. The reported products were generated from beneficiated bulk samples drawn from 35 air-core and eight reverse-circulation holes within the Jupiter Inferred Resource envelope. The company has not announced a production decision, project economics or a binding commercial agreement.
Scoping Study Becomes the Next Test
Critica is now pursuing product qualification, further counterparty engagement, completion of the MREC sample and finalisation of the Jupiter Scoping Study. The Jupiter and Mt Lindsay Scoping Studies are both targeted for release in the third quarter of 2026.
The next disclosure will need to connect the attractive product grades with recoveries, mass balances, reagent use and potential market specifications. Until that work is published, Jupiter has a stronger technical story and tangible products for evaluation, but not yet a demonstrated commercial project.
Bottom Line?
The samples give Critica something concrete to put in front of potential customers; the Scoping Study must show whether those products can support a viable flowsheet.
Questions in the middle?
- Will potential counterparties accept the MREO and iron concentrate specifications after product qualification?
- Can the reported recoveries, mass rejection and acid savings be maintained at a scale relevant to project economics?
- What development pathway and financial metrics will the Jupiter Scoping Study establish?