GENEVA (Reuters) - A huge yellow diamond known as the Sun-Drop Diamond sold for 11.28 million Swiss francs or $12.36 million, a world record for a yellow diamond, at auction on Tuesday night, Sothebys said. The diamond, the worlds largest pear-shaped fancy vivid yellow weighing 110.03 carats, was the top lot at Sothebys semi-annual jewelry sale in Geneva. The stone was discovered in South Africa last year and cut and polished by New York-based Cora International which put it up for sale, the auction house said in its catalog. It had a pre-sale estimate of $11-15 million. The hammer price includes the commission paid by the owner, who Sothebys auctioneer David Bennett said was a private individual who wished to remain anonymous. It sold for a record for a yellow diamond ... It was exactly within our expectation for this spectacular stone, Bennett told reporters after the sale.