Share 'Blue White Red are colors of diamonds at Sotheby's.'

Three exceptional diamonds will be sold by Sotheby's in Geneva on November 19, two of them displaying extremely rare colors. Start with the deep blue. Weighing 10.48 carats, it is an exceptional size for this color. The press release says that the deep blue color is due to the replacement of carbon atoms by boron in the diamond crystal. It is naturally flawless, and perfect in its cut, both for…