Heavy Rare Earths Enrichment Confirmed

(LSE:REE) Altona Rare Earths PLC announced the receipt of rare earths assay results from its 2025 drilling campaign at Monte Muambe. The company reported wide significant intercepts, including up to 30m at 2,677ppm HREO and HREO/TREO ratios ranging from 21% to 77%. Individual dysprosium oxide grades reached up to 567ppm Dy2O3, with a significant intercepts weighted average of 172 ppm Dy2O3. Published JORC mineral resource estimates for Monte Muambe include 13.6Mt at 2.42% TREO, 3.48Mt at 20.6% CaF2, and 11.73Mt at 54.7g/t Ga2O3. The project is held under a 25-year mining licence and has received a US$ 1.875 million grant from USTDA to advance the rare earths component through the prefeasibility stage. The company expects to determine in the coming weeks whether a dedicated HREE mineral resource estimate is warranted. Xenotime, a HREE mineral, was identified for the first time at Monte Muambe, providing a potential pathway to producing a marketable HREE concentrate as a by-product of fluorspar processing.