I've dealt with jewelers....and they don't reccomend girls wear natural opals in cold weather either, but they still make it. It's jus a Characteristic of the stone. My point is, they made it once, if I meant that much, make them fix it so you keep the sentimental piece, and then don't deal With the store again. You let them tell you something that you knew not to be true. They made it once, make them fix it. You basically let
Them steer you where they wanted to. I'd go back and get my ring back and repaired if I was you....but that's just me.