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.

A recent public appearance by King Charles III and Queen Camilla has sparked controversy among royal watchers and traditionalists. During a walkabout, Queen Camilla briefly overtook

Queen Camilla joined husband King Charles and other members of the royal family at day 2 of Royal Ascot on June 18. After wearing a brooch worth $2.5 million to the opening day of Ascot on June 17, on Wednesday the Queen wore another brooch that was a tribute to another Queen—her late mother-in-law,