Aga Khan emerald sells for staggering $13.4 million in Geneva

The Aga Khan emerald has sold for $AU13.4 million at an auction in Geneva. The 37-carat gem was a gift from the Aga Khan Prince to his wife, Nina Dyer, in 1960, just five years before her death at age 30. The gem has been bought and sold over decades, including by the French jewellery empire Van Cleef and Arpels. It is now the world’s most expensive emerald.