'The Rock,' the largest white diamond ever auctioned, sells for US$21.9 million

A Christie's employee holds "The Rock" a white diamond of 228,31 carats, which is the largest white diamond ever seen throughout auction market history, in Geneva, Switzerland, Friday, May 6, 2022. (Salvatore Di Nolfi / Keystone via AP) A Christie's employee holds "The Rock" a white diamond of 228,31 carats, which is the largest white diamond ever seen throughout auction market history, in Geneva, Switzerland, Friday, May 6, 2022. (Salvatore Di Nolfi / Keystone via AP)

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