RAPAPORT... Christie's expects to sell a rare fancy-vivid-pink diamond for between $30 million and $50 million, potentially setting a new world auction record price for the color category. The rectangular-cut, 18.96-carat, type IIa Pink Legacy, belonging to theOppenheimer Family, will lead the Magnificent Jewels sale in Geneva, the auction house said Tuesday. The stone is the largest fancy-vivid-pink diamond Christie's has everauctioned, describing the piece as internally "very pure." "The discovery of this previously unrecorded and remarkablediamond will cause immense excitement with collectors and connoisseurs ofdiamonds around the world," said Rahul Kadakia, international head of jewelryat Christie's. "Its exceptional provenance will no doubt propel it into a classof its own as one of the world's greatest diamonds." The PinkPromise, an oval-shaped, 14.93-carat, vivid-pink diamond, which Christie's soldat its Hong Kong auction for $32.5 million in 2017, holds the current record. Christie's will sell the Pink Legacy at its MagnificentJewels auction on November 13 at the Four Seasons Hotel des Bergues in Geneva.The auction house will preview the stone in Hong Kong, London, New York andGeneva between September 28 and November 13. Image: 19-carat Pink Legacy Diamond. (Christie's)