Theory one: diamonds can levitate. This supports the theory of sapphire being a diamond. I know it's not that big but if you want so see a full explanation go check out water23 book of Steven universe theories. This is also supported by the fact that rose can levitate. like I said go to her books for further explanation.
2.gems can fuse. Yes gems can. But doesn't that mean that corrupt gems can fuse. They TECHNICALLY are gems,the only difference between a gem monster and a gem is the illusion they call bodies. Something else I have thought of is that corrupt gems can summon a weapon.

That's all for know bye! Sorry I was gonna make a picture collage with Rose levitating when she goes to Greg but couldn't find a picture.