Ok, I tried again and I have some more actual feedback now.. Its a bit embarrassing, but my dumb ass thought the bones was already discovered and I had to dig the dirt to find artifacts.
Slight spoiler ahead for anyone who hasn't played the game:
I started digging in the large chunks of bones and found 3 artifacts in one playthrough. None were in perfect condition tho, and I was hoping to actually progress. I also only earned 45 coins from that run, which isn't a whole lot if I need 900 extra coins for faster tools.