Thank you very much for all your pictures, this is indeed a fabulous piece, I dare to say the most stunning of the Luxembourg collection.
I agree with Tamara, this was best worn by GD Maria Teresa with this particular hair style, it looked more balenced. I know, I know... this is not the place to discuss hair styles, but I am sure we all agree that the perfect hair style does makes tiaras "shine" at their best (or the other way around some times) .