it looks to be a princess center stone about 2.5 carats, unless she has thin fingers, set in a simple thin band. Maybe it's a tiffany's setting, either 4 prong or so, but you can't totally tell from that picture. That's my guess. It's lovely, as are her long lovely fingers...
Ok, so you definitely think it's a princess cut?? It is so gorgeous and I just love this ring. My fingers arent as long and skinny as hers but i still love the ring!
Ok, it's not 2.5...it's more like a 2ct or so...sorry, my eyes are bad. They make diamonds bigger...
From the color pic, the band looks to be yellow gold, which I think makes it look warm and delicate. I know of like that yellow gold and white diamond thing...very nice. May I ask who it is? and how did you get pictures of her hand?