A star pendant on a gold chain which is the symbol of the Brotherhood of the Crystal Star.
Lone Wolf can obtain this item from Banedon if he encounters him during Flight from the Dark. It is mainly used to determine if Lone Wolf is already familiar with Banedon and the Brotherhood when he encounters them in later adventures. It is also one of the items that can be carried into the Grand Master series, making it the only Special Item that can potentially be carried by Lone Wolf in every book. As noted it has no useful purpose in later books, though, and is mainly allowed to be kept as a memento of his early adventures.