 Sigma Lithium Corporation has announced a roughly 50 increase of the total estimated mineral resource at its Grota do Cirilo project in Brazil following a NI 43-101 mineral audit at its Phase 3 NDC deposit. The new estimate clocks in at 85.7 million tonnes, up from the previous estimate of 58.9 million tonnes, which the company says makes it among the largest mineral lithium projects in the world. 