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Brazilian Critical Minerals has achieved yet another breakthrough at its flagship Ema rare‑earth project—this time with exceptionally high‑grade Pregnant Leach Solution (PLS) recovered during its in‑situ recovery (ISR) trial.

A peak TREO grade of 3,510 ppm was recorded, significantly above in‑situ mineralisation, demonstrating the remarkable efficiency of field leaching.

Extraction hole H1‑F9 averaged 2,281 ppm TREO, including 929 ppm MREO, while H1‑F6 delivered 1,639 ppm TREO with 737 ppm MREO—all achieved in just 10–11 days of ISR leaching.

Notably, magnet rare earth oxides (MREOs)—critical for EV motors and high‑performance magnets—make up 40% of the TREO in the PLS.

The PLS also includes about 45 ppm of dysprosium and terbium, and ~100 ppm of samarium, underscoring not only the commercial value but also the strategic and defense application potential of the rare earth mix.

In essence, Brazilian Critical Minerals has demonstrated an extraordinary capacity to extract premium-grade rare earths right from the ground using a simple, low‑impact ISR method, positioning Ema as a standout, cost‑effective, and ESG‑friendly advancement in the global rare earth supply chain.

Stockhead: Brazilian Critical Minerals assembling Ema puzzle as ISR leach solution returns high-grade REEs