World's most expensive green stone sells for an eye-watering £7million more than 60 years after it was gifted to a British socialite
The Cartier diamond and emerald brooch, which can also be worn as a pendant, dethrones a piece of jewellery made by fashion ...
Aga Khan emerald, world's most expensive green stone, fetches record $9 million at auction
A rare square 37-carat emerald owned by the Aga Khan fetched nearly $9 million at auction in Geneva on Tuesday, making it the ...