The Negima Anime FINAL Nodoka Miyazaki Amulet was released in Japan in September 23, 2011 by Broccoli. It was promotional merchandise to go along with the movie that was released shortly before.
This amulet is part of a five-piece set, each featuring official character art from the Ala Alba series.
It's a type of charm that holders can carry if they want a certain wish to come true. It's made of a suede fabric.
This amulet's wish is: Academic Accomplishment