Talk:Lion's Dimension/@comment-117879-20150504210012/@comment-26121490-20150611005519

Also, the gems can survive underwater without air. You could surmise that they have some sort of ability to use the oxygen in water (like fish), but then that wouldn't explain how Garnet can swim in lava, as stated in "Giant Woman". Furthermore, their "human" appearance is merely an illusion, the actual Gems themselves are just the little minerals that they retreat to when injured. I think it's safe to assume that since the actual Gems do not require any form of respiration to survive, and therefore their physical manifestations do not, either.