7. Persian Treasures
Given to: The Duke of Edinburgh and Queen Elizabeth
Given by: Persia
Estimated Value: $191–$546 million*
The Koh-i-Noor diamond, one of the most famous jewels in the world, has a history as captivating as its brilliance. Gifted to Queen Victoria in 1849, the diamond has been passed down through generations of royal women.

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The diamond’s name, meaning "Mountain of Light," reflects its grandeur. With its tumultuous history and extraordinary value, the Koh-i-Noor remains one of the most iconic pieces in the Royal Collection.