Albus helped the other wizard to his feet and then took the piece of ore back. It was cool as he curled his fingers around it... he wasn't sure why that was surprising. "Thank you."
He noticed the stutter with a faint note of interest and, more keenly, a stab of sympathy. Still, he took care to keep any reaction off his face. Instead Albus regarded the man with a faint look of concern.
"If you're sure..." He turned the rock over again in his hand, feeling the uneven surface. He felt slightly embarrassed all of a sudden - he wasn't usually the type to come pelting down the corridors at people.
"It's Mr Potter, isn't it?" Albus knew the family - he'd taught one of them, and there were a few of them about the castle - several of whom looked alarmingly alike. He was also aware that there was one that shared his name, which struck him as odd, considering his experiences with Harry.
"Forgive me for asking but..." he glanced down at the nugget still clutched in his hand. "I don't suppose this felt hot at any point, did it?"