I carry around my eyeshadow everywhere and I break it a lot :/
But just because it's broken doesn't mean that it's worthless, anymore.
Put the pieces back into the case as best as you can
Then start smashing the pieces together
Spritz some rubbing alchohol on the eyeshadow
Start mashing it in again and then leave it
5
Then... it should be restored back to it's original state :p