PMET Hits >97% Caesium Extraction in Bench Tests

A separate program with Koch Technology Solutions is underway. KTS is applying its proprietary flowsheet to about 6 kg of pollucite concentrate. Phase 1 results showed strong and selective caesium recovery, the company said. Phase 2 will expand the mandate to produce gram quantities of caesium derivative products as a bench-scale proof-of-concept.

Next steps include producing gram samples of high-purity caesium sulphate, caesium carbonate, caesium formate, and potentially rubidium carbonate. That test program is running at SGS Lakefield, with results expected around Q4 2026.

A preliminary economic assessment for the broader Shaakichiuwaanaan Project, covering lithium, caesium, and tantalum, is scheduled for completion in Q4 2026. It will complement the feasibility study for the CV5 Pegmatite, also due in Q4 2026, and mark the first economic look at the project's caesium potential.

The property hosts the world's largest in-situ pollucite-hosted caesium pegmatite mineral resource, with 0.69 million tonnes at 4.40% Cs2O indicated and 1.70 million tonnes at 2.40% Cs2O inferred.