Aga Khan emerald fetches record $9m in Geneva auction
A rare square 37-carat emerald owned by the Aga Khan fetched nearly nine million dollars at auction in Geneva on Tuesday, making it the world鈥檚 most expensive green stone.
A rare square 37-carat emerald owned by the Aga Khan fetched nearly nine million dollars at auction in Geneva on Tuesday, making it the world鈥檚 most expensive green stone.