What is the story of Megan's blue ring that she wore after her wedding?

The bells tolled, the newlyweds kissed, and the Duke of Sussex left the church, bidding their guests, to meet them. After a short time, at the reception, here Duchess Megan changed her dress, from a dress with long sleeves and a long tail, to another simple white dress without sleeves, and here she is seen wearing a blue ring. From aquamarine, the ring itself belongs to Princess Diana, mother of Prince Harry, who gave the ring to his wife after their marriage.