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Blue diamonds from the deep Earth are all wet

A close-up view of the 'De Beers Cullinan Blue' diamond on a dark grey reflective surface

A 15.1-carat diamond from the Cullinan mine in South Africa gets its blue colour from the element boron. Credit: Justin Lane/EPA-EFE/Shutterstock

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Nature 612, 592 (2022)



  1. Regier, M. E. et al. Earth Planet. Sci. Lett. 602, 117923 (2023).

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