Well, you can always vary it up.
Like, say, my stone, Aquamarine. Based on magical semantics, it could actually be used to bestow water-based abilities.
Or ruby might bestow the ability to generate red energy, for blasts, constructs, etc.
That might help our powers vary enough.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)