Because of its extreme popularity, Attack On Titan has received all kinds of merchandise from t-shirts and hoodies to mugs and lamps. It has also had a fair amount of jewelry, such as plastic bracelets and necklaces. However, there hasn’t been any authentic jewelry until now.
The creators of Attack On Titan collaborated with Material Crown to make real silver jewelry based on the series. Click here to see pictures of the jewelry pieces, and read the first Anime News Network article that has my name on it 😀