Donn by Alexandra the Queen Been in possession since: 1902 Value Approximation: $5.7 million* The King Edward VII Ruby Tiara, which was commissioned in 1902 by the always stylish Queen Alexandra, captures the romantic spirit of the day. This stunning tiara, set in gold and silver, features an amazing arrangement of circular motifs set with captivating diamonds and rubies.
Donn by: The Duchesses of Gloucester and Kent Held since: the middle of the 1800s Value Approximation: $2.1 million* The deep purple amethysts in the Kent Amethyst Demi-Parure are a magnificent royal suite complemented by sparkling diamonds. It was then given to the Duchess of Gloucester after being owned by Queen Victoria's mother, the Duchess of Kent. This eye-catching set comes with a tiara, brooches, earrings, and necklace.