The largest-ever D-flawless diamond to be put up for auction has sold for £25.3 million ($33.5 million) at Christie's in Geneva. The white, matchbox-sized "Creation One" diamond from Swiss ...

which could be the fourth-largest gem-quality diamond ever discovered. Sotheby's A D-color flawless oval diamond was the first of its importance to be auctioned without reserve: Weighing 102.39 ...