6. Emerald-cut diamond engagement ring by Platinum Cartier
Grace Kelly, Princess of Monaco, was the wearer.
Been in possession since 1955
Value Approximation: $39.46 million*
The Princess of Monaco Grace Kelly was well-known for leading an opulent lifestyle. Her ring of engagement was no different. The total weight of the ring was 10.48 carats. Prince Rainier of Monaco, her billionaire fiancé, gave Cartier $4.06 million to design the ring. That is almost forty million dollars in today’s currency.
Grace Kelly’s Engagement Ring on Pinterest, via Alex Smith 56
Many other engagement rings—though none at such an exorbitant cost—have been influenced by the Cartier ring. The ten-carat emerald-cut diamond in the middle of the ring was encircled by taper on both sides. A duplicate of the engagement ring is kept in the Princess Grace Room in Monte-Carlo, while the original is currently housed in the Grimaldi House.
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