Australian mining company Sovereign Metals Limited has announced a major and strategic rare earth breakthrough at its Kasiya Rutile-Graphite Project in Lilongwe. The rare earth’s composition is said to distinguish Kasiya from all major global producers. In its latest statement, the company says it has successfully recovered a monazite concentrate containing high-value heavy rare earth elements (REEs) from the tailings stream generated during rutile processing at its upgraded Lilongwe laboratory.
The firm says the material was recovered from non-conductor tailings that would otherwise be discarded during electrostatic separation of heavy mineral concentrates from Kasiya ore, meaning that no additional complex processing is required. Sovereign Metals said chemical analysis of magnetic concentrates from processed drilling samples, carried out by Scientific Services South Africa, confirmed favourable rare earth oxide distributions. It says preliminary results showed that the monazite concentrate contains exceptional levels of heavy rare earths, averaging 2.9 percent combined dysprosium and terbium, rising to as much as 3.9 percent, and averaging 11.9 percent yttrium, with values reaching 17.3 percent.
The concentrate is also said to contain light rare earths, including 21.8 percent neodymium-praseodymium. According to the company, this rare earth composition distinguishes Kasiya from all major global producers. The five largest rare earth operations, which together account for more than 70 percent of global output, are dominated by light rare earth elements, while strategically critical heavy rare earths are in short supply and increasingly sought after by the United States, Japan and the European Union.
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Sovereign Metals Limited Managing Director and Chief Executive Officer Frank Eagar described the recovery as an exceptional development with the potential to fundamentally enhance Kasiya’s strategic significance. Eagar said the heavy rare earths recovered, including dysprosium, terbium and yttrium, were essential for advanced technologies such as permanent magnets, defence systems, aerospace applications and high-temperature engines, and that they had become even more critical following China’s export controls imposed in April 2025. “China imposed export controls on all three in April 2025, and Western supply chains are now acutely exposed.
What makes this value addition particularly significant is that this product was recovered from our rutile processing tailings stream. “We are not currently contemplating a complex, standalone rare earth operation. We have recovered critically strategic rare earths from what would otherwise be discarded– a by-product of the processing route we will use for rutile and graphite production,” he said. Eagar observed that Kasiya’s rutile would feed aerospace-grade titanium production, adding that its graphite was essential for battery anodes and traditional industrial applications.
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