Which resources can't be gotten back after you farm them in Don't Starve? I know that if you dig up grass, a berry bush, or sapling, you can replant them in another spot. However, if you put them in the research machine, are they totally gone for good or do they respawn somewhere else on the map? If not, does that mean that there is a limited amount of stone and gold that you can get per map?
Here's a handy list of the current known resources and their availability:
As you can see, the list is still a work in progress, since I'm trying to discover everything on my own. I'll try to keep this updated every time I find something new. Keep in mind anyway that new features are constantly added to Don't Starve, so these information is not fixed and still likely to be changed from time to time.
The only things in the game that aren't renewable including animals and objects are: ghosts, swamp monsters, frogs, rocks,and flint. The only thing I don't know is whether or not hounds appear indefinitely.