The amulet was created using a technique called lost-wax casting. Unlike earlier permanent mold casting techniques (which, as the name implies, use metal molds that can be used and reused) lost-wax casting is a one-time option. If you wanted to make, say, a circular amulet with six spokes, you would first craft a replica of the object in wax. You would then create a mold around the object, heat it up and pour the molten wax out before pouring molten metal in. After the metal cooled, you'd break open the mold and be the proud owner of a six-spoked amulet.