"On that occasion, she stunned in a £1 million tiara featuring five captivating aquamarines. The ring in question, believed to be from Collins and Sons, boasts a remarkable 20-carat aquamarine.

The Diamond Belt Tiara is the most significant of a reputedly sizeable collection of heritage tiaras belonging to the Scottish Peerage of Buccleuch. The seat is now headed by Richard Walter John ...