"Oh! Yes, we can fuse with each other. It's... We merge our bodies together, and if it's the same type of Gem as us, we get bigger and stronger. If it's two different types, then we make an entirely new Gem type all together." Since she assumes that Diya would want an explanation for that. "Like, any amount of rubies fusing would always just make a bigger ruby, but if you have a ruby and sapphire that fuse, they make a garnet." Garnet is, of course, the best example she can think of that doesn't relate to her own situation particularly.