#14: Princess Diana’s Engagement Ring

Worn by: Kate Middleton, Duchess of Cambridge

Owned since: 1981

Estimated value: $100,000*

When King Charles proposed to Diana Spencer in the early ’80s, he did things a bit differently. He let Diana choose her ring instead of giving her something from the royal treasure chest. And what did she pick? That famous blue sapphire and diamond ring! Charles paid $36,000 for it back then.

Nowadays, that stunning ring is worth $100,000! Fans went wild when Prince William gave it to Kate Middleton in 2010. Kate absolutely loves the ring, and who can blame her? It’s not every day you get such a special heirloom. However, some might say it’s tied to a famous troubled marriage…