An “ultra-rare” purple-pink diamond sold for a record 24.4 million Swiss francs ($26.6 million) at an auction in Geneva on Wednesday evening.The 14.83-carat stone, dubbed “The Spirit of the Rose,” is now the most expensive purple-pink diamond ever to sell at auction, according to Sotheby’s.The sale comes more than three years after the gem was uncovered from a mine in northeast Russia. Taking its name