The History of Princess Diana's Aquamarine Ring • Princess Diana's aquamarine ring has a fascinating history that dates back to the 1960s. The ring was originally a gift from Brazilian socialite Lucia Flecha de Lima to Queen Elizabeth II. The queen had the ring designed by the famous British jeweler Asprey, who created a stunning emerald-cut aquamarine stone set in yellow gold. The ring was added to the queen's vast collection of jewels and was worn on several occasions, including the state opening of parliament in 1974.