The Duchess of Windsor, Wallis Simpson, possessed one of the most remarkable and valuable jewelry collections in history, a ...

It features 739 brilliant and 149 baton diamonds. Lotus Flower Tiara Kate Middleton is seen leaving Kensington Palace for the Diplomatic reception at Buckingham Palace, Dec. 3, 2013.

Duchess Kate also wore a brand new accessory with a lot of meaning, one we've yet to see her wear. Adorned on the left shoulder of her pale blue Alexander McQueen gown, Kate wore the Royal Family ...

Queen Elizabeth may have her Cullinan diamonds, among other fabulous jewels, but daughter-in-law Camilla, Duchess of Cornwall, isn't very far behind when it comes to mastering spectacular displays ...

So, let's start with the big ticket items up for auction: The Duchess's diamond tiara, designed and fabricated by Cartier for her in 1930—in other words, a moment in fashion history when tiaras ...