If the Wishbone is equipped, it should work. If yours isn't detecting anything, that could mean one of a few things. The number one reason it wouldn't detect anything is that there isn't anything there. Not all mountains have silver. The other reasons include a mod error interfering and your game glitching out. Try restarting your game and trying again if you have confirmed there is metal in a location you are using the Wishbone.not. They can both detect silver, gold, and iron.