Prince Sadruddin Aga Khan’s emerald sold for nearly $9 million. He commissioned Cartier to create the brooch for his wife. His wife later auctioned the emerald in 1969. A rare 37-carat square-cut ...

A rare square 37-carat emerald ... Diamonds". "Emeralds are hot right now, and this one ticks all the boxes," said Christie's EMEA Head of Jewellery Max Fawcett. "We might see an emerald of ...