Princess Ingeborg of Sweden wears her diamond and turquoise star tiara for the Nobel Prize Ceremony in Stockholm, December 1937; more on the tiara’s Russian imperial history here!

Queen Silvia of Sweden wears the Napoleonic Amethyst Tiara and jewels for a dinner at the Spanish embassy in Stockholm, October 1979; more on the amethysts here!

Queen Silvia of Sweden wears the Connaught Diamond Tiara (with the Russian Pink Topazes) for the Nobel Prize banquet in Stockholm, December 1977; more on the tiara here!