This is why Harry stabbing Tom's diary instantly destroys it in Harry Potter And The Chamber Of Secrets. However, in the same book, Harry is also pierced by the Basilisk's fang when he fights the monster.
Harry Potter was wounded by the venom and would have died if Dumbledore's phoenix Fawkes hadn't shed healing tears upon him, but the fact that he was healed also prevented the Horcrux inside him from being destroyed.
Harry was only saved by Fawkes' tears, and subsequently used the fang (on which his arm had been impaled) to destroy Riddle's diary, which he later discovered was one of Voldemort's seven Horcruxes.
Why didn't the Basilisk destroy the Horcrux in Harry when it bit him in Chamber of Secrets?
Read all the books and Seen all the movies. Because he did not die. Fawkes the friendly phoenix used his tears to heal Harry's arm before the venom was able to kill him. If he was killed by the venom, then at that point the horcrux inside him would've died.
Why the Horcrux in Harry Wasn't Destroyed by the Basilisk [Harry Potter Explained]
Why didn t Voldemort make a Horcrux every time he killed someone?
It was stated at one point that Voldemort had already "pushed his soul to the limit" in creating his multiple Horcruxes. This implied a finite number of Horcruxes any one person may create before the process became too dangerous to attempt again.
Why didn't Tom Riddle make the Basilisk a Horcrux?
Why didn't Voldemort make Basilisk a horcrux? Only he could call it, thus keeping it safe forever. The Basilisk was a giant creature, longer and bigger than two adult Anacondas combined. Voldemort couldn't have it around all the time like Nagini (his snake Horcrux.)
As a Parselmouth, Harry can easily communicate with Basilisk but I don't think he could controlled it as if he has the Basilisk under his will (or make it loyal to him) but more like he can influenced its behavior and take advantage to defeat it. Yes. Harry could have controlled the snake with Parseltongue.
How did Hermione avoid getting killed by the Basilisk?
Hermione was Petrified after seeing the Basilisks' eyes in a hand mirror. Petrification seemed quite powerful, as the legendary Albus Dumbledore concluded that the only way to reverse the effect was through the use of the Mandrake Restorative Draught.
The basilisk was their greatest threat due to its killing gaze and the fact that spiders had many eyes and an extreme field of view, thus making them highly vulnerable targets.
After being healed, Harry took the fang and stabbed Riddle's diary, destroying that Horcrux beyond magical repair. Because Harry had stabbed the Basilisk with the sword, it was imbued with Basilisk venom and was therefore able to destroy Horcruxes and poison opponents that it cut through as well.
In both the book and the movie, there wasn't enough time for the venom to reach Harry's heart, Fawkes heals him before that. In the book, Fawkes flies to Harry instantly, it doesn't lose anytime. Fawkes heals Harry before Harry stabs the diary.
Basilisk venom is extremely powerful, and can kill a person within a little more than a minute at best, making the person drowsy and blurry-visioned before they die. The strength of the venom is one of the few substances known to be capable of destroying Horcruxes, causing them fatal damage that cannot be repaired.
Newt Scamander classified the basilisk as a wizard killer that couldn't be domesticated. Yet, Herpo was able to control his. This had nothing to do with the fact that he was the breeder, and Harry Potter proved that being a Parselmouth wasn't enough - it must have been a Horcrux.
Riddle summons the basilisk after Harry expresses his support for Dumbledore, which in turns summons Fawkes, who blinds the basilisk, allowing Harry to look at it directly without being killed or petrified.
Harry Potter, Ron Weasley, and Gilderoy Lockhart came to the rescue. Ron and Lockhart were stuck behind an avalanche of stone, so the battle was fought mostly by Harry. Harry managed to defeat both the Basilisk and the memory of Tom Riddle, thus saving Ginny's life.
Towards the end of the year McGonagall was forced to act as temporary Headmistress after the Ministry of Magic suspended Dumbledore. Finally, she discovered another note from the Heir of Slytherin which stated that he had taken Ginny Weasley into the Chamber.
After Lord Voldemort destroyed the fragment of his soul residing in Harry, Harry seemingly lost the ability to speak Parseltongue, about which he was glad and relieved. Over the next twenty-two years, he never attempted to speak the language, presuming that it had died with Voldemort.
Basilisk was Slytherin's monster, who can be controlled only by his descendent. Tom riddle was his direct descendent. While Harry got his ability to speak parseltounge because he had a part of Voldemort's soul in him.
The ability to speak Parseltongue is usually inborn; a wizard is born being able to speak Parseltongue, and those who are not born with the ability cannot normally learn the language (although, according to the author, Dumbledore may have learned to understand it, and in Harry Potter and the Deathly Hallows, Ron learnt ...
When Nagini bit Harry at Godric's Hollow while coming out of her disguise as Bathilda Bagshot, it is unknown how dittany was capable of stopping the bleeding, when Arthur and Snape both bled unstoppably, with Snape actually dying from it.
Creating a Horcrux requires committing an act so heinous that it tears apart the creator's soul, usually through cold-blooded murder. Harry Potter himself unintentionally became a Horcrux for Voldemort when the Dark Lord's killing curse backfired, which ultimately led to Voldemort's defeat.
