Something else I felt I should add (most don't really know if its a bug, if its a test, or if its intended)
Ore Veins
They start in every new game as stone
The amount of time you need to wait for ore veins to initially cycle may or may not... ever come... The depleted vein recycle period is, picky, at best.
If you save and reload the game, the veins should regenerate immediately
Anytime there is an issue that makes the game act like you're a new player though, they will be stone again