I am particular towards Charoite 2 for looks. XD I can see any fusion with Carnelian (that has a masculine appearance) being a total flirt. 

[@Akayaofthemoon] Maybe Aquamarine's future power could be a sort of unlocking new abilities in gems or heightening humans' abilities? I can just see her giving someone a needed boost if their in desperate need of help.
Rhythmic gymnastics sound like a good choice. ^_^