DIAMOND TIARA, LATE 19TH CENTURY, Designed as a foliate spray set with circular-cut and rose diamonds, the three flowers set en tremblent, fitted case, accompanied by three tiara frames, five hair pin fittings, four brooch pins and five original drawings depicting the various combinations for the jewels to be worn as a tiara, necklace, aigrette, brooches and corsage ornament, six small rose diamonds deficient.
Image from a Russian wedding magazine article on Boucheron (http://www.wedding-magazine.ru/mode/jeweller/23619/) claiming this is an 'imperial' tiara. Mention in the text of Alix wearing Boucheron, but *not specifically* this tiara - which I don't recognise. Attributions to Alix probably the usual romanticism.
The Post Diamond Tiara - early Victorian c1840. The flower petals and leaves are pavé set with 1,198 old mine and rose cut diamonds. Fashioned "en tremblant;" the flowers were mounted on trembler springs so that every movement would enhance the brilliance and sparkle of the diamonds.
It is believed that the tiara was commissioned sometime during 1900, possibly from the renowned jewelers Chaumet, by Guido Count von Henckel, First Prince von Donnersmarck, for his second wife Princess Katharina.