King Charles and Queen Camilla made it a family affair at Royal Ascot on June 19 as they were joined by several relatives and close friends for the carriage procession at the races.

Stone called Queen Camilla's decision to wear the brooch a "deeply symbolic choice" as "emeralds represent rebirth, renewal, and enduring love." The Cambridge Cluster Emerald and Diamond Brooch is estimated to be worth as much as $50,000, according to Stone.

The King and Queen recalled the “thrill of victory” as they arrived at Royal Ascot for the opening day of the glamorous sporting event. Their Majesties led the traditional carriage procession as they swept onto the Berkshire course to loud cheers from the crowd.