Do you have an Essence Crystal?

I'd love to inspect one.

"As a matter of fact, I do."

If this book is accurate, there must be some kind of connection between the Essence Crystal and its user?

Humor me, all right? Hold your hand over the Essence Crystal.

"Ah... all right?"

Oh! Oh wow! It vanished!

Do you feel any stronger now, [%username]? Did you see the light when it vanished? I think you absorbed it, [%username]!

That was fascinating! I'll have to write this down.

Completion:

Creasione asked that you bring her an Essence Crystal for her research.

You did, and seemed to have absorbed it into your own Essence.