Talk:Peridot/@comment-25839649-20150123145606/@comment-4770262-20150124143745

It'd certainly be interesting! Being isolated on Earth for so long, they spent a lot of time together getting to know each other.

Pearl said a key factor in fusion is to be in sync with whomever they're fusing with, and I think that means that they have to know their fusing partner well enought to do so (Like with Steven and Connie, they know each other really well and were "in sync" when they were dancing). From Lapis (and the slight glimpse of peridot's personality), we can assume that the Gems not affiliated with the CGs are pretty indifferent (Lapis willing to risk depriving a planet of it's only water supply to attain her goals and Peridot mercilessly destroying one of her own robots when it was shown to be malfunctional.) So maybe that relation between the CGs is a pretty unique one, making them the only ones who "Know" each other and the only ones with the ability to fuse!