A model wears a ring set with the Mellon Blue, a 9.51-carat Fancy Vivid Blue diamond graded Internally Flawless and estimated at $20-30 million, during an auction preview at Christie's in Geneva, Switzerland, November 7, 2025. — ReutersThe Mellon Blue, a 9.51-carat fancy vivid blue diamond...from The News International - World https://ift.tt/wkLf6s7
