Cobra Resources (LSE:COBR) - Scale and Heavy Rare Earth Quality Set This ISR Project Apart

Interview with Rupert Verco, CEO, Cobra Resources Our previous interview: https://www.cruxinvestor.com/posts/co... Recording date: 24th June 2026 Cobra Resources is advancing what it describes as Australia’s only rare earth project suited to in situ recovery (ISR), a mining method that offers lower capital costs, reduced environmental impact, and faster development timelines compared to conventional techniques. Located in South Australia, the project has recently confirmed mineralisation across two prospects through sonic core drilling, supporting progress toward a maiden mineral resource estimate. A defining feature of the project is its high-value rare earth composition. Approximately 43% of the mixed rare earth carbonate (MREC) basket consists of heavy rare earths, including nearly 5% dysprosium and terbium—elements critical for electric vehicles and wind turbines and typically more valuable than light rare earths. This positions Cobra competitively among global ionic clay projects. Technical results further support ISR viability. Permeability testing has demonstrated strong hydraulic connectivity, with transmissivity rates of around 8 metres per day and 80% tracer recovery within two days. These metrics suggest efficient leach cycles of 30–60 days and support well-field spacing that enhances operational efficiency. Importantly, high tracer recovery also indicates effective containment, a key requirement for regulatory approval. The project may also benefit from natural sulfide oxidation within the orebody, which can generate sulfuric acid in situ. This could offset a significant portion of reagent costs, typically around 30% of operating expenses in ISR projects, improving overall economics. Cobra plans a low-cost pilot study using existing infrastructure and ANSTO’s facilities to validate the ISR process, followed by a scoping study. With supportive regulatory conditions in South Australia and proven ISR analogues in similar geological settings, the project presents a differentiated, capital-efficient pathway to rare earth production amid rising global demand for critical minerals. Learn more: https://www.cruxinvestor.com/companie... Sign up for Crux Investor: https://cruxinvestor.com