Laurence Graff, a London jewelry dealer, last night bought a diamond in a Swiss sale for 45.4 million francs ($45.6 million), a record for any gem at auction.Graff’s telephone bid for the pink stone beat an estimate of 27 million francs to 38 million francs at Sotheby’s, Geneva.
“It is the most fabulous diamond I’ve seen in my career,” Graff said in a statement issued by Sotheby’s. He named the gem “the Graff Pink,” the auction house said.

