A 163.41-carat D-color flawless diamond sold for $33.7 million at Christie’s Magnificent Jewels sale in Geneva Tuesday. Known as the “Art of de Grisogono, Creation 1,” the rectangular shaped ...

A 50.08-carat D Flawless oval diamond is the centerpiece of an exhibition of gems and high jewelry by Graff, which opens today at Graff’s Palm Beach boutique. Graff, in a statement, says it is ...