Posted by Henri M on October 7, 2012, 5:29 am, in reply to "Re: not the Vladimir"
Interesting that the Pearl Poiré Diadem has an open setting. On your picture you can see the diamonds from behind. That suggests these diamonds are not rose cut (usually set against a silver foil).
I thought the brilliant cut technique was not available when the Pearl Poiré Diadem was made (after the Napoleon Era)?