MemberI wear a 5ct diamond solitaire, but I’d never ever wear a 5ct diamond simulant. If I had to wear a simulant I’d want it to be very small. Like .5 Ct or something.
MemberMy engagement ring is a Moissannite, and I love it to pieces. It’s gorgeous. That being said, as other posters have shared 5ct is definitely a statement (I like smaller gem sizes — I have a .5ct emerald solitaire). I’m not sure what your significant other’s preferenes are other than what you’ve shared, but I would perhaps recommend just looking at rings in the same price range of what you’ve already spent, pick something out together, and returning the other one if your partner has different preferences.
MemberTo be honest, this post really makes me upset. You must be such a sweet fiance. Hope she knows that. Just talk to her and fix it together. Make it a good memory rather than a bad experience 
MemberI’m confused by all the people saying there was a lot of thought put into this. It doesn’t seem to me that you thought about what your fiance would actually want. She’s probably disappointed in the ring and also that you didn’t consider her preferences or that you two weren’t on the same page. These are definitely things you can adress going forward and make right with more communication.
MemberIt seems as though the issue is the size and not the fact that it’s a moissanite. Honestly I would hate to have a 5 carat ring. I would feel very flashy and over the top, and would probably feel more like costume jewelry to me than a real engagement ring. I feel like you could have gone with 2-2.5 carats for her finger size and it would have felt more balanced?
Memberdundee : a 5 ct Moisannite must have cost you a pretty penny , I am searching online and they are over a few thousand dollars for a mossy that big!!! I woukld try to return it and exchange it for something you’re fiance would like! so sorry you are stressed out but I would not like the ring either. I dont think anyone on weddingbee would want a stone that huge! diamond or not it’s just freaking gigantic
MemberRamonafrances: agree!
nycbee523 : nah, moissanite can be had relatively cheap now, more than CZ of course but still very cheap compared to a same sized diamond. Most of the expensive moissanite rings we hear about are so expensive because of the settings… This moissanite is even with a gold setting.
MemberIt sounds like you were really trying here, but yeah…5 carats is huge. Like obnoxiously big IMO. And if it were a real diamond, those start at like $50k.
I have a fake canary diamond RHR that’s like 2.5 carats and I feel super awkward when people comment on it. I can’t imagine dealing with a stone twice that size AND people asking if it’s “real” all the time.
Sorry but I would try and return/exchange the stone and don’t be too hard on your fiance for talking to you about it.
MemberAnd I know you said you talked to her about moissanite and she was “ok” with it, but I wonder if you were really listening to her or hearing what you wanted to hear. I’m quite sure that if you bought her a diamond that was more expensive than the 5ct moissy, she would not have complained about you spending too much. Reading between the lines there’s a big difference between being “ok” with something and being enthusiastic about it. She’s not making noises like an enthusiastic moissy fan. Get her a diamond in the size you can afford. Finger coverage is just a thing for insecure people to worry about.
Membermrstodd2bee : oh wow that is very adorable! i was looking on overstock and helzberg and the price tag was almost at 3K for a branded stone around that size. If OP spent a few hundred dollars I am sure he can make it right and hopefully get the fiance something she would like.
Membernycbee523 : yes, so many countries/vendors to buy moissanite now, nice ones too! The stones are becoming cheaper and cheaper. Op said the setting he bought was *platinum* .Hopefully he can reuse that for her new stone as that setting itself probably wasn’t cheap..
Memberramonafrances : the thought may have been misplaced… but calculating pixels on pictures to find out finger coverage definitley qualifies as thought haha
MemberKind of shocked to see my ring in here but ok. Hope it was fun calculating pixel coverage for a size 3.5 finger. Lol.
Memberdeannamarie : The moissy pic is yours? I’d contact them about using your photo without permission! Its pretty btw.
Membersweatergal007 : no, my ring is the diamond halo that OP posted a link to and was apparently measuring the pixels of.