It will never cease to amaze me at the audacity of some people. My first instinct would be to totally ignore them, but that if you don't respond then they automatically think it's "fake." I would say, "Gosh, it was a gift and I would never be so rude as to ask the person giving it to me if it was real or a fake. I just said thank you because I think it is beautiful and was a thoughtful gift!" Hopefully that would put them on notice that their question was rude and also is an answer that they will get no satisfaction from.Hi ladies. 1st post here. What would you say to a person rude enough to ask "Is that a real diamond or is it one of those lab created fakes?" None of your freakin' business is my initial response. But what would be a more polite response?