GENEVA (AP) — Christie's sold the "Pink Legacy" diamond at auction Tuesday for more than $50 million including fees, saying it's a new world record price per carat for a pink diamond.

Christie's said renowned jeweler Harry Winston was the buyer. The auction house had expected to fetch $30 million to $50 million for the nearly 19-carat, rectangular-cut stone, the largest fancy vivid pink diamond that it has ever put under the hammer.

It was the standout offering at Christie's fall jewelry auction in Geneva. The standing-room only ballroom broke into applause after the auctioneer struck down a h...