Kate Middleton, $380,000
One requirement for royalty is that every member has a least one glamorous piece of jewelry and Kate Middleton’s engagement ring from Prince William is no exception. Originally belonging to his late mother Princess Diana, the ring is a 12-carat blue sapphire cut into an oval shape surrounded by 14 solitaire diamonds.The setting for the jewel is 18K white gold with the ring valuing almost 300,000 pounds (roughly $380,000).