Err... I don't know. Proposing with a fake £10 ring sounds cheesy to me. You can always go shopping together for the wedding bands :-)
I agree it would be cheesy to propose with something fake-looking, but you can buy a really nice-looking ring for that price, that she is unlikely to realise isn't real (unless she's a jeweller). I proposed that way and afterwards when I told my fiancee that we had to buy a real ring, she was surprised that the ring wasn't real. Maybe I shouldn't have told her :)
The problem with non-GIA certificates is that because GIA is the standard, the reason that anyone submitted to a non-GIA authority is that they think they'll get a higher price if they sell it with a non-GIA certificate. In which case you, as customer, are paying more for the same diamond...
Well, the first choice is between yellow and white -- some people want yellow (gold) jewelry.
This is true. As the fiancee wears both gold and silver, I assumed she was OK with both.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.