It's Slytherin's locket.
Ron
It is Slytherin's locket.
Yes, but it required a Parselmouth.
Not too big. Just the size of a regular locket on a necklace.
because it was a horcrux. it would help to destroy voldemort
He took the locket Horcrux from Voldemort.
First off, I think you mean horcrux, and it was the locket.
Spoilers: RAB stole the locket, a horcrux, as he/she revealed in their note in the basin where the locket was found. Read The Deathly Hallows to find out who RAB turns out to be. It is obviously imperative the heroes (Harry, Ron, Hermione) discover who RAB is/was to uncover what became of the real locket. It is imperative since the locket is a horcrux and must be destroyed to have a hope of defeating the nemesis in the books, Lord Voldemort.
exactly, who knows, but he died after he made Kreacher take him to the cave where Voldemort had hidden the locket/horcrux. He drank the potion in the bowl thingy where the locket was.
the part of voldemort in the locket tried to instigate ron not to kill the horcrux
Metal,plastic,resin. :)
Totally there are seven horcruxes. Horcrux No:1 - Tom Riddle's Diary (that came in the Harry Potter & the chamber of secrets) Horcrux No:2 - Gaunt ring (which came into Voldemort's possession when he stole it from Marvolo Gaunt) Horcrux No:3 - Slytherin's Locket (original was replaced by a fake one by Regulus Black) Horcrux No:4 - Helga Hufflepuff's cup Horcrux No:5 - Rowena Ravenclaw's Diadem Horcrux No:6 - Part of voldemort's soul that was inside Harry Horcrux No:7 - Nagini (Voldemort's snake)