I agree it is very pretty, but I don't think it's her orginal ring. I see her wearing this set from time to time, sometimes with only one band. I have seen her orginal ring in person. I had the opportunity to meet her peronally, her husband lived in my neighborhood. She is very sweet and down to earth..
It could be diamonique, I wear mine when we travel for fear of losing it. It has the look of Judith Ripka, she has bands that look very similar. However, real or not it's a very pretty set and she deserves it.