As The Telegraph reported, a shipping company gifted her the chrysanthemum-shaped brooch made from platinum, diamonds, and sapphires after she launched an oil tanker.
She was later photographed wearing it in Hampshire, England, for their honeymoon portraits — earning the pin its "Honeymoon Brooch" moniker — and again in numerous wedding anniversary images.
Most recently, Queen Elizabeth wore the brooch on Commonwealth Day in March when Prince Philip was in the hospital, as reported by the Daily Mail.