Board Thread:News and Announcements/@comment-26967247-20160209215523/@comment-26618197-20160415200625

Hmm you know there is a theory that Sapphire and Lapis knew each other before she and Ruby fused. Perhaps Garnet knew this and thought there was a chance that that very same Lapis was corrupted and in the mirror, she may have confided in Rose on the subject and Amethyst overheard them. Hmm that would mean another Crystal Gem might've kept the mirror or a Homeworld gem then it was dropped at the galaxy warp and Pearl found it then used it at some point in front of Garnet...