Having a spiritually- or supernaturally-gifted friend makes your life more magical by association (and probably makes it smell better).
The best physical token of appreciation you could give them, then, is something that meshes with their kind of mysticism.
The key is knowing what kind of craft they practice. Do they prefer no one speaks to them before they've had their coffee morning tarot pull? Does the entrance to their home smell like cinnamon on the first day of every month? Would they...