Adding my comments from the other thread to this one.
I think the setting is lovely and the stone looks big. As far as cut quality, color and clarity you would have to post a straight on
shot of the stone and we may or may not be able to tell you anything. Is the stone certified by like GIA or AGS or???
Is this your engagement ring? If it is, what we usually say if it's not returnable then it's really too late to ask. Because no matter
what people say (good/bad or otherwise), nothing can be done. Best to enjoy it and the loving sentiment behind it.