No, it has been permanently damaged. I don't think they ever said that it was destroyed. And Infinity War confirms it. After 'the snap', we can see that the gauntlet looks like it has half melted, smoke is coming out of it. But Thanos still teleports out of there, so at the very least space stone is still working. I also read that he also uses time stone to heal his chest wound, but that is really hard to see, so I'm not sure about that one.