As the classic campaign slogan goes, “A diamond is forever.” You’ll wear your engagement ring for the rest of your life, so ...

A rare square 37-carat emerald owned by the Aga Khan fetched nearly nine million dollars at auction in Geneva on Tuesday, ...

After all, from Meghan Markle’s sentimental stones to Sofia Richie’s emerald-cut stunner and Gabrielle Union’s 8.5-carat ...