Mrs Hayes Burns emerald diamond tiara created by Boucheron in 1904, seen on top in his first version of that jewel. Mrs Hayes Burns was the sister of the banker J. Pierpont Morgan.
Later it was rebuild with the emeralds and diamonds from Boucheron in the 1920, for her daughter Mary, who married Lewis, first Viscount Harcourt.
In 1920 Boucheron get also the order to create an bandeau & choker, matching the tiara and the other Harcourt jewels.
Source: Archiv Boucheron;
The Harcourt - Diamond Tiara of styled flower ornaments and large Diamond Riviere with Diamond Pendant
Isabelle of Orléans Princess of France| Countess Bruno d'Harcourt| Royal Wedding Jewels History | Mariage Princier