To use this talisman to invoke prosperity, you must invoke it in yourself as well. Remember a time when your pockets were full of money, whey you felt rich, even if you weren't. Hold the feeling in your mind while you hold the talisman in your hand, and tell it that it has the power to bring you money. When you feel sure that you have connected with the sensation of the rich, your amulet will have felt it, too.
The designs on this amulet with a pentagram star come from the Kabbala tradition, and they are intended to invoke God as one who gives blessings.