 This ended 166 years of Garrard's tenure as the inaugural British Royal Jeweller, although Garrard still holds a royal warrant from her son, the Prince of Wales.More recently, Garrard made the sapphire engagement ring given by Charles, Prince of Wales, to Diana, Princess of Wales for their 1981 marriage.After the Death of Diana, Princess of Wales, the ring passed to her sons, and in 2011 it returned to the public eye as the engagement ring Prince William, Duke of Cambridge gave to his wife Catherine.