Rare 37-carat emerald and diamond brooch sells for $8.8 million

An extremely rare 37-carat emerald and diamond brooch was sold for $8.8 million in Geneva, Switzerland on Tuesday. The Cartier emerald brooch -- also known as the “Aga Khan emerald” -- was a gift from Prince Aga Khan to his bride, British socialite Nina Dyer, in 1960.