Carved Seashell Ring

In the Mystic Stones Series humans are protected from vampires by wearing a ring or bracelet that has been carved from a seashell using an obsidian blade that has killed a vampire.

This happens because the obsidian absorbs the vampires' soul when it pierces the heart. Once the dagger is used to carve a seashell ring the soul is then transferred into the ring and remains there to warn other vampires that the wearer is protected. The ring forms a shield around the wearer so that even if a vampire ignores the warning from the soul of the dead vampire, no harm can be done to the protected.