I think you can be assured that Tiffany will stand behind their rings. Our bands are from there but they are gold and no stones. I have a couple of rings with small stones from Tiffany, and I remember the SA telling me that they discovered over time that stones tended to fall out of one particular design, I believe now discontinued, and they replaced those stones free for anybody who had the issue. I have a half eternity Soleste ring I’ve been wearing almost daily for four years. No issues with the stones, and I intentionally chose a half eternity because I am told the full eternities get more wear on the palm side from dashing into tables etc.