“Blimey, it was lucky you thought of a bezoar,” said George in a low voice.

“Lucky there was one in the room,” said Harry, who kept turning cold at the thought of what would have happened if he had not been able to lay hands on the little stone.

Hermione gave an almost inaudible sniff.  She had been exceptionally quiet all day.  Having hurtled, white-faced, up to Harry outside the hospital wing and demanded to know what had happened, she had taken almost no part in Harry and Ginny’s obsessive discussion about how Ron had been poisoned, but merely stood beside them, clench-jawed and frightened-looking, until at last they had been allowed in to see him.

Harry Potter and the Half-Blood Prince – J.K. Rowling