Australian Mine Achieves 86% Rare Earth Recovery Rate

Mount Ridley Mines just cracked the code on extracting rare earth minerals more efficiently than almost anyone thought possible at its Grass Patch project near Esperance, Western Australia.

The company reviewed old test results and discovered something remarkable. Using conventional hydrochloric acid leaching, they achieved recovery rates as high as 86.5% for heavy rare earths, the critical materials that power electric vehicles, wind turbines, and advanced electronics.

The numbers get even better. At the Vincent prospect, screening techniques delivered a 200% upgrade in total rare earth oxide concentration. Two other sites, Mia and Jody, averaged 164% upgrades, meaning the company can dramatically boost the quality of material before it even enters processing.

What makes this discovery special is which minerals they're recovering. Neodymium and praseodymium, the magnetic rare earths essential for electric motors, hit 85.2% recovery rates. Heavy rare earths like dysprosium and terbium, even more valuable and harder to find, actually leach more effectively than their lighter cousins at this site.

The secret lies in the geology. The project's mafic-dominated rock formations make the minerals compatible with standard processing equipment, avoiding the need for expensive custom solutions that plague many rare earth projects.

Mount Ridley unveiled an inferred resource of 122.56 million tonnes in late March, containing nearly 109,000 tonnes of rare earth oxides. An impressive 41% of that sits in the heavy rare earth category, the stuff that commands premium prices and strategic importance.

The Ripple Effect

China currently controls roughly 70% of the global heavy rare earth supply, creating vulnerability in supply chains for everything from smartphones to defense systems. Australia and allied nations have identified rare earth production as a critical strategic priority for energy transition and national security.

Mount Ridley's breakthrough offers a potential pathway to diversify that supply. High recovery rates combined with standard processing methods could make Australian rare earths cost-competitive, giving manufacturers alternatives to Chinese-dominated markets.

The company plans to use these results as a foundation for further optimization, potentially recovering scandium and gallium as valuable byproducts. Sometimes the most important discoveries come from taking a fresh look at data you already have.

The momentum is building for rare earth production outside China, and Western Australia just took a significant step forward.