New York, NY – Apr 1 – Critical Metals Corp. (Nasdaq: CRML) (“Critical Metals Corp.” or the “Company”), a leading critical mineral mining company, today announced that the historical metallurgical test results done by AMTEC / ALS in 2016 has been successfully replicated in the 2025 test work program undertaken at Fremantle Metallurgy laboratories, Perth Western Australia, under the review of independent consultant Professor Tony Tang. Professor Tony Tang utilized a duplicate ore sample that was used in the original 2016 Tanbreez study.
Highlights
· Outstanding 2.96% TREO and HREO refined concentrate
· Approximate 40% increase over the previous 2.1% TREO refined concentrate results.
In December 2025, the Company received the initial assay reports from Fremantle Metallurgical test Work and Independent Laboratory assay confirmation by Nagrom Metallurgical, in Perth, Western Australia, under the guidance of Independent Company Consultant, Emeritus Professor Dr Tony Tang.
The results confirmed up to ~40% improved refined concentrate from historical Test Work in 2016 AMTEC/ALS, by application of new technology, with total TREEs recovery results that mark a significantly improved refined concentrate and confirmation of repeatability.
The eudialyte and mixed-concentrate recoveries were confirmed to contain all 8 significant in-demand rare earth elements (REEs), including heavy rare earth elements (HREEs) and strategic rare metal concentrates. Using a simplified and improved flowsheet, enhanced by modern permanent magnets operating at 10,000–12,000 gauss and optimized staging, the process achieved recovery rates better than 85%.
The improved results were achieved through modifications to the flowsheet in the primary magnetic separation stage. These changes enabled the recovery of all magnetic and paramagnetic materials using higher-gauss magnetic separation to more effectively reject non-magnetic material, followed by additional beneficiation and polishing stages.
This improved flowsheet enabled a third-stage magnetic separation to reject low-REE-value magnetic material, resulting in the recovery of a higher-grade eudialyte concentrate. The process achieved better than 85% deportment recovery, with an increased overall yield of ~40%.
Tony Sage, Chairman of CRML, commented:
“Given these outstanding results, the current flowsheet announced in the previously released PEA is now obsolete. A replacement PEA will be issued confirming Pilot Plant concentrate production results approximately 3 months before the Company releases a revised DFS.
This represents a significant milestone for the Tanbreez development as the project transitions from laboratory-scale testing to pilot plant operations, scheduled to commence in May 2026. The program will include production of a simulated 1:100 pilot-scale concentrate, supporting future full-scale processing.
I am pleased to announce this progress as our international team continues to successfully produce concentrate for our offtake partners in the EU, Saudi Arabia, and the USA.
Test work remains ongoing, while field activities in Greenland—including drilling programs—are in the final stages of planning. These efforts will support the supply of fresh pilot plant feed from Tanbreez, beginning in May 2026”.
Polishing Test Work for Final Export Con (Eudialyte)
Process Flowchart for Final Production of Eudialyte Export Con
Nagrom 2026 – Metal Oxide & Rare Earth for Concentrate 1 and Concentrate 2
Comparison Table between historical 2016 Test Work and 2026 Test Work
The Company remains committed to advancing the Tanbreez Project through targeted metallurgical programs, with the upcoming 150-tonne bulk sample in June 2026 representing a critical milestone. This work is expected to validate processing pathways and support the consistent production of TREO and metal oxide concentrates, reinforcing confidence in the project’s technical and commercial potential.
The offtake partners will each receive a minimum of 10t of high-grade pre-production eudialyte concentrate for their refining development.