Extended Data Fig. 1: NiO content of ferropericlase in worldwide super deep diamonds.

NiO content (wt%) versus molar Mg number for ferropericlase inclusions in diamonds from this study (Karowe, Botswana) and world-wide sources of super deep diamonds from Kankan²⁶, Koffiefontein⁵⁴, Juina^55,56,57,58, Buffalo hills⁵⁹, Slave^60,61, and South Australia⁶².