Originally posted by NukeAJS:

If it's a mineable resource like silver or scrap iron, you have to hit it with your pickaxe. If it's a chest like in the meadows -- you have to destroy the chest.

Thanks, I don't recall having to destroy the chest; more so when I logged in later the wishbone was detecting something still but a little further, and the "invisible" item that my wishbone was beeping at was gone. Might be something with the remains that didn't trigger the ending of the wishbone search.