The engagement ring given to Kate Middleton by her fiancé, Prince William, belonged to his mother, Princess Diana. The ring is the stunning 18 carat blue sapphire and diamond ring his father, the Prince of Wales , gave his mother in February of 1981. In an interview with Fox News, Diana’s former butler Paul Burrell said the ring will be introduced to a new generation through Kate Middleton. "This was my way of making sure that my mother didn't miss out on today," William said as the couple posed for photographers inside St. James's Palace. The wedding is set to...