No livro 6, capítulo 4, quando Dumbledore leva Harry para conhecer Slughorn, ele está usando o anel de Gaunt para atrair Slughorn:
He shrugged and spread his hands wide, as though to say that age had its compensations, and Harry noticed a ring on his uninjured hand that he had never seen Dumbledore wear before: It was large, rather clumsily made of what looked like gold, and was set with a heavy black stone that had cracked down the middle.
Mais tarde, no capítulo 10, depois de ver a memória de Odgan, o anel ainda está no escritório de Dumbledore:
He turned away again, and was almost at the door when he saw it. Sitting on one of the little spindle-legged tables that supported so many frail-looking silver instruments, was an ugly gold ring set with a large, cracked, black stone.
Do que, no final do capítulo 13, depois da memória de Dumbledore com o jovem Tom Riddle, venha isto:
Harry got to his feet. As he walked across the room, his eyes fell I upon the little table on which Marvolo Gaunt's ring had rested last I time, but the ring was no longer there.
"Yes, Harry?" said Dumbledore, for Harry had come to a halt.
"The ring's gone," said Harry, looking around. "But I thought I you might have the mouth organ or something."
Então, vemos que o anel foi destruído em algum lugar no meio - isto é, no meio do sexto ano de Harry.
Mas no sétimo livro, no capítulo 33 "O conto do príncipe", estamos aprendendo que:
And now Harry stood in the headmaster’s office yet again. It
was nighttime, and Dumbledore sagged sideways in the thronelike
chair behind the desk, apparently semiconscious. His right hand
dangled over the side, blackened and burned. Snape was muttering
incantations, pointing his wand at the wrist of the hand, while
with his left hand he tipped a goblet full of thick golden potion
down Dumbledore’s throat. After a moment or two, Dumbledore’s
eyelids fluttered and opened.
“Why,” said Snape, without preamble, “why did you put on
that ring? It carries a curse, surely you realized that. Why even
touch it?”
Marvolo Gaunt’s ring lay on the desk before Dumbledore. It
was cracked; the sword of Gryffindor lay beside it.
Então o anel é destruído na mesma noite em que Dumbledore encontrou!
Alguém pode resolver o conflito?!