#17: The Poltimore Tiara

Worn by: Princess Margaret

Owned since: 1959

Estimated value: $1.3 million*

Garrard originally made this awesome thing for Florence Bampfylde, but it was auctioned in 1959. Princess Margaret snagged it for £5500, and it’s not just any old diamond piece; it’s actually made up of 11 brooches!

Margaret loved it so much she even wore it on her wedding day. But what really got people talking was this pic of her chilling in the tub wearing the tiara. Later, her kids sold it for a cool $1.3 million! The design is super intricate and cool to look at, but let’s be real – it’s Princess Margaret who made it special.