I think there should be a way for splitting objects in inventory.
When you get a crystal, for example, it is added to the other crystals that already are with you, and they all remain in the same slot. But if you want to give only ONE crystal to somebody? You can\'t, because when you pick up the crystals, they all come together.
However, if you can separate one crystal and put it in another inventory slot (not together with the others), it would be possible.