The Tomtor mine is a large mine located in the Sakha Republic (Yakutia). Tomtor represents one of the largest phosphates reserve in Russia having estimated reserves of 500 million tonnes of ore grading 35% P2O5.
Tomtor contains one of the world's largest concentration of rare earth minerals, estimated to be as high as 14.5%. the field remains undeveloped.https://www.srk.com/en/projects/tomtor-resource-reserve-estimationhttps://www.miningweekly.com/article/rosneft-takes-control-of-russias-largest-rare-earth-deposit-2025-05-21https://arctic-russia.ru/en/project/rare-find/https://www.arctictoday.com/why-are-the-russians-rushing-to-mine-rare-earths-in-the-arctic/
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