While unearthing some gems veins in the game for later mining I realised that every time I log to the game the vein seems to "grow" larger. I tested flatting everything around the place where the line of the vein ends and the next time I log on gems seems to go further in that place. Is this a bug (I am not seeing the gems even if they are there) or do they grow somehow?
Unsure if gems are meant to regenerate or not, but the earth/chests do shift a little bit each game.
I know this for sure because during one OCD session, I unveiled the corner of each treasure chest because I was close to getting stone-aged chests. On subsequent game plays, the chests have been re-buried, sometimes underneath (!?) an abode and thus no longer reachable without destruction.