Wolfe wasn't particularly excited about going into that enclosed room to retrieve the treasure, so he immediately tried using [Levitate] to bring the crystal out to him.
The magic seemed to simply glide over the crystal, so Wolfe tried a different target. There were a few pieces of jewelry sitting on the floor, not attached to anything, so he tried lifting them instead.
That wasn't a problem, and they lifted without incident, so Wolfe carefully set his backpack down and made his way to the building.
If worst came to worst, he could use the [Transfer] function of the Familiar Bond to bring himself to Stephanie, who was safely outside of the affected area. Unlike the original inhabitants, he wouldn't be stuck inside a barrier that would kill him on contact.