From deep pink-red rubellites, to spessartite garnets, yellow diamonds, aquamarines and more ... This one here showcases a ...

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

In 1960, Prince Sadruddin Aga Khan commissioned Cartier to set the emerald in a brooch with 20 marquise-cut diamonds for ...

"My sons' wrists would be covered by the end of the summer, and just before they went back to school, we would cut them all ...