Pink Diamond and Origins - A rare Pink Diamond has ended up being the most expensive rock ever before auctioned, marketing in Geneva for SFr45.44 million ($45.72 million) - almost twice the previous document. Sotheby's said Tuesday's purchaser of the 24.78-carat "elegant intense pink" precious stone, established between little white diamonds on a platinum ring, was British diamond supplier Laurence Graff. Four prospective buyers had actually contended for the stone, which had actually been forecasted to fetch in between SFr27 as well as 38 million. The previous record had been established by competing auctioneers Christie's, when they marketed the blue 35.56-carat Wittelsbach-Graff diamond for $24.3 million in 2008. "Tonight's spectacular outcome shows that genuinely remarkable objects will bring truly remarkable rates," David Bennett, chairman of Sotheby's jewellery department in Europe and also the Center East, stated after the sale, estimated...