Burne closes the box, takes a small key from his pocket, and locks the box. Then he hands the box and the key to Kurt. "The gem is obviously a powerful force of evil. This box should shield you from its emanations. It should be guarded for now, and it seems that you possess the strength of will to resist its temptations."
Turning, he nods to the guards. "Take the dwarf to the dungeons, and treat him well. His actions were no fault of his own." As the guards drag the still struggling dwarf down the steps toward the dungeon, Burne turns back to the rest of you. "My guess is that the effects should wear off shortly now that the gem can no longer influence him. We will keep him secure, and keep an eye on him, until then. It would not do to let him loose before we are sure."
Burne moves to pour himself a large snifter of brandy, and then sits heavily in a padded chair nearby. He sighs, and takes a large gulp of the potent liquid. "It will take a couple days to add the enchantments to your items as requested. My apprentice and I shall also take some time to research this gem and what its true purpose may be. I do not believe destroying it is a simple matter, such as smashing it with a hammer...it is an artifact of evil, and not easily overcome."
Burne takes another gulp of his brandy. "In the meantime, I suggest you make whatever other preparations you may need to continue your assault against the Temple. The general store may carry some useful items, and Ostler Gundigoot might have a few as well. He has a tendency to collect interesting items, if you know to ask. If you need to exchange coin for gems or such, the moneychanger may be of interest as well. And the village folk are always glad to see adventurers with coin." He smiles at you.
"Return here at sundown, two days hence, and your items should be ready. I hope to be able to tell you more of this gem at this time as well."