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BRISBANE, AUSTRALIA - APRIL 11: Princess Diana, Wearing The Spencer Family Tiara With A Suite Of Sapphire And Diamond Jewels Which Had Been A Gift From The Crown Prince Of Saudi Arabia, At A State Reception In Brisbane, Australia (Photo by Tim Graham Photo Library via Getty Images)

BRISBANE, AUSTRALIA - APRIL 11:  Princess Diana, Wearing The Spencer Family Tiara With A Suite Of Sapphire And Diamond Jewels Which Had Been A Gift From The Crown Prince Of Saudi Arabia, At A State Reception In Brisbane, Australia  (Photo by Tim Graham Photo Library via Getty Images)