These are my youngest lithops "hatched" in April. They didn't get much care from me. I've potted them into pumise stones as they were 3 or 4 weeks old and treated them as grown-ups ever since. I think they've turned out quite well though.
It's a mix of C189, C261, C309 and C373. Because of a small accident, I can't tell which is which now. (Maybe when they're big enough?)