The George IV State Diadem
King George IV has this diadem created in honor of his 1821 coronation. It is made with over 1333 diamonds and two strands of pearls that wrap around the crown. The heavy crown is worth $600,000. Queen Elizabeth II also wore the crown on her coronation day.
Grand Duchess Vladimir Tiara
Originally owned by Grand Duchess Elena Vladimirovna, the aptly named Grand Duchess Valdimir tiara was snuck out of Russia during the revolution and was sold to Queen Mary. It is now worth about $470,000.