Mozambique: Altona Rare Earths identifies heavy rare earths enrichment in Monte Muambe fluorspar, gallium ore

Altona Rare Earths is a London-listed exploration and development company focused on critical raw materials projects in Africa, with its flagship Monte Muambe project in Mozambique hosting rare earths, fluorspar and gallium alongside the Sesana copper-silver exploration asset in Botswana. The company holds a long-term mining licence at Monte Muambe, aims to fast-track acid-grade fluorspar output and is evaluating gallium recovery to support demand for critical inputs to clean energy, technology and defence industries. Altona has identified significant enrichment of heavy rare earth elements in fluorspar and gallium ore at its Monte Muambe project, with a heavy-to-total rare earths ratio of about 40%, far above the project’s existing light rare earths deposit.

Management sees the potential for a high-value heavy rare earth by-product to sit alongside gallium, and has launched mineralogical, metallurgical and expanded assaying workstreams to assess recoverability without delaying the current fluorspar and gallium resource estimate. The discovery brings Monte Muambe’s heavy rare earth grades into a range comparable with a leading Namibian project backed by Japanese interests, underlining the strategic importance of the find against a backdrop of Chinese supply dominance. Altona says a successful integration of heavy rare earths into the fluorspar processing flowsheet could materially enhance project economics and strengthen its leverage in ongoing cooperation with U.S.

agencies and participants in the North American rare earths supply chain. Altona is pleased to announce the identification of Heavy Rare Earths Elements (HREE) enrichment in its Monte Muambe#fluorsparand#galliumore, with samples showing approximately 3,200 ppm Total Rare Earths Oxide (TREO) and 1,300 ppm Heavy Rare Earths Oxide (HREO), representing…pic.twitter.com/5mMkFq5RK2 — AltonaRareEarths (@AltonaRareEarth)April 14, 2026 “The identification of a heavy rare earth enrichment within the Monte Muambe fluorspar ore is an exciting development, given the scarcity and strategic importance of these elements, and will potentially materialise as an additional value…pic.twitter.com/ILBVdqLd3M