In my opinion, you are going about this the wrong way, as an earlier poster said, today most women are involved in the ring selection to some degree. When I finally selected a ring, I knew what she wanted, we made the process fun. We do not know where you live, whether it is in Podunk or NYC. I recommend you make the process fun, go around with her to jewelry stores to try on rings and see her reaction. If you live in a major city area, go to Tiffany''s, Cartier, HW, Van Cleef, DeBeers, for example. You are not the one to wear it, she has to wear it, show it to friends and family and love it. You might not feel so good if it gets back to you that she loves that you bought her a ring but really does not care for it. OK, just my 2 cents.