User blog comment:Maimer1882/Metal.../@comment-3146930-20110929025457/@comment-3146930-20111001162601

We know it can kill monsters, but we dont know if it is because of silver or because the arrows are bronze and they just use silver against werewolves. Considering they were hunting the wolves in the first place, of course they would have silver on them. However, because Annabeth doesnt describe it as being a precious metal and the fact that only Artemis and her hunter use it, it most likely isnt a precious metal otherwise others would have it