Blue-green diamond called the “world’s rarest” sells for record $17.3 million at auction
A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist sold for $17.3 million on Wednesday, Christie’s said, calling it a record price for a stone of its kind sold at auction. The “Ocean Dream,” the standout offer at the auction house’s Geneva sale of jewelry, was found in Central … Read more