Marie Poutine's Jewels & Royals: Floral and Leafy Diadems. The various elemnts are mounted with tiny springs (the technique called "en tremblant". This results in the tiara being seemingly alive, because the pieces tremble, as the wearer moves.
glitter-of-jewelry: “ Empress Marie Louise’s Bridal Crown ”
A diamond and pearl festoon tiara necklace combination, with five large diamond foliate scroll motifs each topped with button pearls, and two smaller terminals, and button pearls scattered throughout, on a band of diamonds