User blog comment:Goldensunsheba/I AM OFFICIALLY DEAD/@comment-9434717-20160810155719

Perhaps Rose was a Defective Quartz. Not defective like Amethyst, but rather she thought differently than the rest of Homeworld as a whole. Maybe she had a "snapping" moment, like Peridot did with Yellow Diamond. Except instead of yelling at her through a communicator, she simply poofed and shattered her (maybe with the help of Pearl?) Maybe she was also originally made on earth. Who knows.