Part of the parure that was a wedding gift from Napoleon to his bride Empress Marie-Louise, the diadem originally contained emeralds. Van Cleef and Arpels vandalised it by replacing them with Persian turquoises. The tiara is now in the Smithsonian in Washington.
This gold and turquoise tiara and necklace, c.1825, illustrates the stylistic transition of the 1820s, incorporating the palmettes and meanders that had remained in vogue after the French Empire, enmeshed with vine branches that announced the naturalism of the Romantic style. http://www.adorn-london.com/jewelry-inspiration/a-walk-through-chaumets-historical-jewels/ http://preziosamagazine.com/chaumet-un-ponte-tra-passato-presente-e-futuro/
MELLERIO dits MELLER - In the 1860s, a technical handbook was produced to show, with the aid of an explanatory note and assembly diagrams, the different ways of transforming a diadem made up of different brooches into an assembled trailing corsage and bouquet.
TURQUOISE AND DIAMOND TIARA, 1880s. Of interwoven foliate and ribbon design set with circular-cut and rose diamonds, set at intervals with five clusters of cabochon turquoise within borders of cushion-shaped and circular-cut diamonds, inner circumference approximately 383mm, clusters detachable, one small diamond deficient.
A diamond and turquoise belle epoque tiara, circa 1910. Featuring oval turquoise stones held on greek lyre-shaped diamond pinnacles with foliate scrolls on a diamond band; between which are circular diamonds in scalope-shapes arching over sprays of leaves in groups of five.
Turquoise and diamond tiara/necklace, late 19th century Designed as a graduated series of palmette motifs, each set with a cabochon turquoise within a surround of circular-cut diamonds, mounted on a line of figure-of-eight links. Image Sotheby's http://www.sothebys.com/en/auctions/ecatalogue/2015/fine-jewels-l15052/lot.229.html