The Grand Duchess Vladimir Tiara
Originally belonging to Grand Duchess Vladimir, the aunt of Nicholas II, the last tsar of Russia, this diamond and pearl tiara is a relic of a lost monarchy. The Grand Duchess was separated from the tiara after fleeing St. Petersburg during the Russian Revolution, but was reunited with it when a member of British Intelligence rescued her jewels. She gave the tiara to her daughter, Princess Nicholas of Greece, who then sold it to Queen Mary after her mother passed away. And when Mary died, the Queen inherited it.