Talk:Gems/@comment-27532102-20160103144635/@comment-508329-20160105071443

Theory 1: The Gems were created by long-forgotten alien precursors.

Theory 2: Gems are a natural product of their Homeworld's magic space rock ecosystem (sort of like how elementals just naturally pop up on Azeroth & Draenor). The natural process was slow and unpredictable, so eventually, they invented injector & kindergarten technology to artificially duplicate the process.