@Loony We discussed that it might work but we never really agreed on allowing it to be a thing as far as I know. On top of that, the idea was more of the gem taking over the human body instead of an actual fusion.
@Loony Well, from what we can tell with Stevonnie, Gem-Human fusions would look a lot more human as to be expected. But Reggie and Eve could never fuse as Greg sadly had to learn the hard way.