The diamond’s current setting, once described by Evalyn Walsh McLean as a “frame of diamonds,” was originally created by Pierre Cartier and has remained largely unchanged since the early 1900s. NMNH, ...

Thanks to a modern marketing campaign, the not-really-rare gem became the iconic stone for eternal love. A 274-carat masterpiece cut from a 599-carat stone, the Centenary diamond is one of the world’s ...