Board Thread:General Discussion/@comment-26469589-20150706045529/@comment-508329-20150706051105

Other possibilities:
 * Homeworld Gem sent to finish Jasper and Peridot's missions.
 * Rebel or refugee who fled the Homeworld.
 * Lost Kindergarten gem who hatched after Amethyst.
 * Neutral Gem who didn't take a side during Rose's rebellion and went into hiding instead.
 * Another, more successful gem shard fusion experiment that Peridot grabbed from the Kindergarten before the Crystal Gems got there.
 * Plot twist: The Desert Glass turns out to be an imprisoned Gem like Lapis Lazuli.
 * Plot twist: Onion (really unlikely).
 * Plot twist: Kevin (also really unlikely).