possibly but silver not a vampire thing that is more for lycans. A good kid should have something for all occult needs. Salt lots of salt. good for ghosts and stuff. Iron is the real thing you want to have especially iron shavings. That is for the fairies. Basically anything you can put in a powder or bullet of those items can be converted into a projectile also for your fire arms. As for what that is never seen it.
what you really should have for vampires is rice or seeds. Old romanian myth is that vampires need to count not a stereotype of a group of people at all. So throw some rice on the ground thy are compelled to pick it up …sand might work also never have heard of that though.