A rare square 37-carat emerald owned by the Aga Khan fetched nearly $9 million at auction in Geneva on Tuesday, making it the ...

Sold by Christie's, the Cartier diamond and emerald brooch, which can also be worn as a pendant, dethrones a piece of jewelry ...

Working in marketing two decades ago, Megan Flynn never would have envisioned herself as a gemologist at the helm, with her ...