#15: The Lotus Flower Tiara
Worn by: Princess Margaret
Owned since: 1923
Estimated value: $4 million*
The Lotus Flower Tiara is now Kate Middleton’s, but Princess Margaret rocked it back in the day. It’s a band of diamond arches with pearls on top. Originally, it was a necklace given to the Queen Mother by her husband for their wedding in 1923. Then, she turned it into a tiara…

Kate’s worn it a few times, but it’s been MIA lately, much to fans’ disappointment. It’s classy enough to be subtle but shiny enough to turn heads; that’s why Princess Margaret loved it. And come on, a tiara with diamonds from the early 1900s? That’s as royal as it gets!