source: post #25 Van Cutsem-Astor wedding thread
"Two sprays of mixed flowers, entirely pavéd with diamonds, meet at the large, open wild rose in the center. The sprays can also be worn as brooches. The diamonds, set in flowers, are recorded in the Heathcote inventory of 1786 and have descended in the same family since..."
The tiara is named as being the property of Baroness Nancy Willoughby de Eresby, 28th Baroness Willoughby de Eresby, who apparently was one of the train bearers for Queen Elizabeth at her coronation in 1953.
The mother of the present owner of the tiara (the Baroness) and the grandfather of the bride were siblings, both children of Waldorf Astor, 2nd Viscount Astor.
v Lady Rose Astor & Hugh Van Cutsem
Image cropped from larger pohotograph and constitutes less than 20% of the original. > the diamond tiara
That is a beautiful tiara, but from the way that she is wearing it, it looks like she is playing dress up. The dress was gorgeous, but the tiara really took away from it. So sad, beautiful bride, gorgeous dress and wonderful tiara, just all put together rather badly.