Not a stupid question at all. I hope by now this has been fully addressed - and I'm assuming it has - but we most certainly guarantee our jewelry. Just remember, as bluebananaeater said, always contact whomever you purchased your items from first :)
Also, I apologize for the lag in answering questions... Things around here have... been on fire lately, as you might have seen on the news!
“Quality, quality, quality: never waver from it, even when you don't see how you can afford to keep it up. When you compromise, you become a commodity and then you die.”
Gary Hirshberg quotes