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.
How did Dumbledore know that the ring was a Horcrux?
Dumbledore is a inhumanly smart person with a chessmaster-intelligence far beyond any normal human. He was sure there were Horcruxes after laying a eye on the diary (or at least started to think Voldemort might have them).
Wanting to use it to revive his family and apologise for his selfishness in the past, Dumbledore lost his common sense, forget that it was a Horcrux which may have been cursed, and adorned it on his right hand. Almost immediately, the curse triggered, and nearly killed Dumbledore.
He tried to. He blithely forgot that the ring was now a horcrux and put it on his finger, intending to apologize to his parents and sister, but the ring cursed and nearly killed him.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
The REAL Reason Dumbledore Put on the CURSED Ring - Harry Potter Theory
Who did Albus Dumbledore marry?
Dumbledore didn't marry anyone . He was a gay and loved Grindewald in his teens but later his closeness with him proved fatal . Grindewald didn't turn to be a good person but a muggle hater . Because of him Dumbledore lost his sister Ariana and his living brother Abeforth never talked to him ..
Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").
How did Dumbledore destroy the ring without destroying the stone?
After Dumbledore returned to Hogwarts, he used the Sword of Gryffindor 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.
It is a gold ring inset with a black stone (actually the Resurrection Stone, but neither Marvolo Gaunt nor Lord Voldemort were aware of its existence) engraved with what Marvolo Gaunt called the Peverell coat of arms (having come into the Gaunt line from an heiress of the Peverells, not the Slytherin family), which is ...
He probably got to know Harry was a Horcrux when he saw the Scar on Harry's forehead, but maybe he wasn't sure. Then, when Harry came to Hogwarts and Dumbledore got to know he can speak Parseltongue his thought of him being a Horcrux got stronger.
Snape Didn't Want To Kill Dumbledore, But He Had No Choice
He made a grave mistake by wearing the ring, allowing Voldemort's curse to injure him. The Dark Lord's evil magic caused the tissue in Dumbledore's right hand to die and turn black, and that curse would only continue to spread throughout his body over time.
IT was when Harry and Hermione were on their own without Ron, and were hunting for the Horcruxes, its when Harry used to wake up with terrible headaches in themiddles of the night screaming sometimes. Hermione's research into Horcruxes at that time concluded Harry was Voldermot's Horcrux.
Eventually, the headmaster revealed that this resulted from a curse placed on the Peverell ring, a family heirloom Voldemort had turned into a Horcrux. It wasn't until Harry Potter and the Deathly Hallows that it was explained that this curse did more than harm Dumbledore's hand—it had sentenced him to death.
Why didn't Dumbledore tell Harry how to destroy horcruxes?
Dumbledore Never Really Had Time To Explain How To Destroy The Horcruxes. As much as Harry would have benefited from Dumbledore's knowledge of how to destroy the remaining five horcruxes, there was simply not enough time before his death to do so.
August 1943: Tom Riddle murders his father at home in Little Hangleton, sending a piece of his soul into a ring formerly owned by Marvolo Gaunt, the younger Riddle's grandfather and a descendent of Salazar Slytherin himself. The ring becomes his second Horcrux.
Wizards have a longer lifespan than muggles thanks to their magical nature and abilities to heal faster, among other aspects, which is why Dumbledore had a long and interesting life, one full of adventures but also tragedies that made him into the great wizard he's remembered as.
Albus Dumbledore, for example, died when he was 115 years old, which was relatively young for a wizard. Nicholas Flamel and his wife lived more than 600 years thanks to the Philosopher's Stone, but regular wizards can live between 150 and 200 years. The Trolley Lady, for example, is around 190 years old.
He was eventually forced to accept that his father was the Muggle parent, and that his mother was the magical one. It was around this time that Riddle gave himself the alias "Lord Voldemort", to spare himself of the reminder of his "filthy Muggle father".
Although he wasn't turned into a werewolf, he did develop some wolfish tendencies such as a liking for very rare steaks. He married Fleur on 1 August 1997, although their wedding was disrupted by the arrival of Death Eaters following the fall of the Ministry of Magic.
The movies follow the books closely enough that they aren't really separate universes, except for the fourth movie. There isn't any truly compelling evidence that Snape is Harry's father, because all the points you raise are explained. Snape hated Harry because Harry reminded him of the man who "stole" Lily.
Harry describes Umbridge to Sirius Black, saying that she's vile enough to be a Death Eater, despite not being one. Umbridge is also depicted to be a prejudiced person, despising half-breeds and Muggle-born witches and wizards to the point of firing Hagrid due to his half-giant birth status.
The elder brother: Aberforth the owner of Hogs Head Tavern and Inn in Hogsmead, who we all learned became a father during “Secrets of Dumbledore” movie. Or, the younger brother: Albus, who we all know had no children beside those who attended Hogwarts.
His dad gave it to him. To elaborate on Icecreamdif's answer, he inherited it as a family heirloom dating back to Hardwin Potter, who married Iolanthe Peverell, granddaughter of the Cloak's original owner Ignotus. It was passed down to the eldest male of each new generation of Potters since then.
