Learn how to be a gem and go on an adventure with your friends by wearing one of our Steven Universe Costumes for Halloween. If you want to be the half-human and half-gem character who is ready to help save the world, then you need a costume that is perfect for Steven Universe cosplay. If you want to be completely magical, then grab a gem Halloween costume for Amethyst, Garnet, and Pearl. Be sure to complete your look with a Steven mask, shield, and more! Whether you are heading to a convention or to a Halloween party, Spirit Halloween will be a great resource for Steven Universe costumes!