The Dutch sapphire tiara. It includes 655 South African diamonds, now set in platinum. The 33 sapphires are nestled at the bottom of the diadem. Adding to the sparkle factor, some of the stones are en tremblant – meaning set on springs, so that they move with the wearer and create the maximum amount of reflection. The tiara was purchased in 1881 by King Willem III of the Netherlands for his wife, Queen Emma.