Priyanka Chopra’s Blue Diamond at the Met Gala

$25M. This Fancy Vivid Blue diamond is one of the rarest in the world, weighing in at 11.16 carats. This was the first time Bulgari’s Laguna Blu is being seen in a new setting, a diamond chain necklace, since 1970, where it was originally set in a ring, landing Chopra on our list for the best celebrity natural diamond looks of 2023.