By Roberta Naas Just last month, Graff Diamonds unveiled the Graff Venus, the largest D flawless heart-shaped diamond in the world. The stone weighs 118.78 carats and was cut from a 357-carat rough that had been discovered in 2015. That one stunning diamond sparked a renewed interest in statement-making diamonds. Here, we bring you a look at three top designers’ white-hot diamond jewelry pieces – just in time for the holidays.