Explore the British Royal Family's Dazzling Collection
2. The Ruby Tiara Set from Denmark
Donn by: Princess Mary the Crown Been in possession since: 1869 Value Estimate: $100,000–$500,000* The French, Danish, and Swedish royal families have all held the Danish Ruby Set. The Danish Ruby Parure, which Crown Princess Mary has worn, is the focal point of this collection. This ruby and diamond tiara is part of a set that also includes adjustable earrings and studded hairpins.