A cross-over I've been dying to draw for a long time now!! The mane 6 as gems from SU.
Twilight - Charoite
Rainbow Dash - Mystic Topaz
Fluttershy - Pink Beryl/Morganite
Rarity - Banded Amethyst
Applejack - Citrine
Pinkie - Spinel
Will upload the other 3 in a sec....