After Dumbledore returned to Hogwarts, he used Godric Gryffindor's Sword to crack the Resurrection Stone so as to destroy it as a Horcrux. While the act did destroy the ring as one of Riddle's Horcruxes, it did not stop the fatal curse. The curse gave Dumbledore's hand a withered black look, as though it had died.
However, all of this was no match for Albus Dumbledore who was able to retrieve the Horcrux and destroy it with the Sword of Gryffindor. For his troubles, he discovered the ring to be cursed, which blackened his hand and left him with a death sentence placed upon him.
Gaunt's ring
After retrieving the ring Albus Dumbledore himself fell victim to a curse that, even when contained, would likely have killed him within the year. Once rendered defunct as a Horcrux, the stone was placed inside a Golden Snitch and left to Harry Potter in Dumbledore's will.
What caused his hand to turn black and decay? Like all the other Horcruxes Voldemort created, a protective curse was placed over the Ressurection-Stone-turned-Horcrux. Anyone who tried to take the ring would be cursed the moment it touched their finger, which is exactly what happened to Dumbledore.
Dumbledore reveals how thoroughly he loves Harry. Harry is brave, and Dumbledore is proud as any father would be. More than that, Dumbledore succumbs to a parent's weakness; he cares more about Harry's happiness and wellbeing than the wizarding world he is trying to protect.
But Dumbledore's hand was not affected by any of these, it was affected by a powerful magical curse that was slowly and steadily spreading. Phoenix tears are not a counter spell. They could not heal a curse.
Hoping to revive his dead family members (particularly his sister Ariana Dumbledore), he disregarded the ring's status as a Horcrux and put it on. This enacted the ring's deadly curse, and it began to quickly spread through Dumbledore's body, starting with the hand on which he had put the ring.
Yes, he could have done it. BUT, when he saw the ring he thought that it was the resurrection stone. One of the 3 Deathly Hallows. He thought that he could see his loved ones and apologize to them for his life mistakes by using the resurrection stone.
Voldemort intentionally made six Horcruxes, but when he used Avada Kedavra on Harry, he unintentionally created a seventh Horcrux. Instead of dying, Lily's love for Harry created a counter 'curse' known as Sacrificial Protection and saved Harry.
The Emerald Potion, also known as the Drink of Despair, is a mysterious potion which induces fear, delirium, and extreme thirst. According to Dumbledore, the potion cannot be penetrated by hand, vanished, parted, scooped up, siphoned away, transfigured, charmed, or otherwise made to change its nature in any way.
His exceptional magical abilities, immense knowledge of various branches of magic, and strategic thinking make him a formidable wizard. Dumbledore served as the Headmaster of Hogwarts School of Witchcraft and Wizardry, was a highly skilled duelist, and possessed incredible wisdom and intuition.
Snape having the same Patronus, the doe, as Lily symbolized his everlasting love and unwavering devotion towards her. He hadn't stopped loving her after their last altercation, marriage to James Potter, or death. She was his "always," his guiding light, and he protected Harry for her.
In order to conjure the avada kedavra curse, you have to want to kill your victim. We all know that Voldemort could easily kill a child without an ounce of remorse... but not Snape. Snape didn't want to kill Dumbledore, and this was why the spell was blue instead of the usual green.
Since the curse spread from a ring which Dumbledore put on a finger, the curse was strongest on his hand which started to rot first. So even if Dumbledore cut off his hand, the curse would simply manifest itself on a different part of his body.
It's a beautiful scene in the book, but it felt wrong in the movie." While the book version of the funeral proved highly emotional and a good ending to Dumbledore's character arc, the script version underwhelmed Heyman and was thus left out altogether.
Voldemort never even realised the Peverall ring he acquired from his dear, uncle Morfin was a Deathly Hallow. Morfin, Merope and Marvolo never realised it was the ressurection stone that was cradled in the rings setting. And the Gaunts handled the ring contstantly for generations before it came to them.
Why did Dumbledore not tell Harry that he was a Horcrux? It appears that Dumbledore was afraid of Voldemort finding out that he knew about the Horcruxes. At the end of Deathly Hallow Harry realized that Dumbledore also did not want to waste anyone else's life.
He believed that Harry was the one person who was smart, courageous, and perhaps lucky enough to find and eliminate all the horcruxes.
Dumbledore was unable to use the Resurrection Stone as Voldemort had put a curse on the ring (it ended up costing Dumbledore his hand). However when Dumbledore speaks to Harry at Kings Cross, he all but says that he intended to speak to his parents and sister again to apologise to them.
Dumbledore didn't use the stone on himself either he decided to 'move on' in limbo and go to the dead distant land of no return! He did not use the Resurrection stone! The only 2 I know who did was the Perverell brother and Harry.
From the curse on his arm, maybe five weeks. He put the ring on and was cursed in early July 1996, and at that point he reckoned he had not more than a year to live. Snape killed him around a week into June 1997.
After Dumbledore was killed (notably, by Snape), Fawkes left Hogwarts and apparently became a wild phoenix again. This, combined with what could possibly be bad blood with Snape over the murder of his owner, might have been the reason for Fawkes to simply no longer care.
It means that he was likely a gift from Newt to Dumbledore who, while brilliant, was not an expert in magical creatures, nor did he seem to have the time to train a phoenix. Instead, it was likely Newt who acted as Fawkes's trainer before giving him to Dumbledore.
Following Dumbledore's death, Fawkes sang his Lament over the grounds of Hogwarts School of Witchcraft and Wizardry, and then left, never to be seen again. His tail feathers were the cores of the two twin wands which were held by Lord Voldemort and Harry Potter.