Al took the lump and examined it carefully. It just looked like iron now, but that didn't mean there wasn't still something going on below the surface. Dumbledore had helped create the Philosopher's Stone after all. Though, maybe not yet.
"I, I am. Yeah. It's not my area of expertise I, uh, I was in experimental charms. Before," he waved vaguely at the castle in insinuate 'all of this'. "But, but I think it's fascinating. The fundamental shifts. It's, uh, something I always hoped to dabble with. Eventually." He handed the lump back with a smile. "What, um, what was this going to become? Gold?" Gold was standard, after all. "Or, or something more interesting?"