Fusion is when two or more gems fuse together to make one person. When Fusing two or more gems have to dance each gem dances a certain way. Opal is When pearl and amethyst fuse,garnet and amethyst is sugilute,malachite is when jasper and lapis fuse and since Steven is a human he can fuse with humans,he fused with his friend Connie to make stevonnie,last is rose and pearl make rainbow Quartz. Ruby fused with sapphire make garnet. When Pearl fuses with garnet they make sardonyx.
