The moment Zein felt no resistant force from the source, his heart sank.
He had wished and hoped that Naoya had mistaken the shape of a shard with a Fallen Star's fragment. But the fragment never repelled anyone; if anything, it welcomed people to touch its corrosive surface. Even if the fragment created a repelling force to protect it, there was no reason to repel espers but allowed a guide--or rather, Zein--in. After all, for the fragment, Zein's power was more destructive than the espers'.
Still, as he walked closer to the podium, he bore a hope that it was just a relic. A relic in the shape of a crystal, or a material coming out of a dungeon. Who knows; maybe in a dungeon somewhere, there was a stone or a crystal that could attract miasma? Maybe that material got transported during the process of a dungeon break.