Item from Harry Potter by J.K. Rowling
A heavy gold locket bearing Salazar Slytherin's ornate serpentine S in green stones — one of Voldemort's Horcruxes — that requires Parseltongue to open and torments whoever wears it.
Slytherin's locket traveled a path that reads like a mystery novel. Made by Salazar Slytherin, it passed to his descendants the Gaunts, was stolen by Merope Gaunt who sold it to Borgin and Burkes for ten Galleons while pregnant and desperate, was bought by Hepzibah Smith, was stolen again by Tom Riddle who murdered Smith and turned the locket into a Horcrux, was hidden in a cave by the sea behind lethal defenses including a lake of Inferi. Regulus Black — Sirius's younger brother, a Death Eater who turned against Voldemort — discovered the cave, drank the poison protecting the locket, ordered Kreacher to destroy it, and died dragged under by the Inferi. Kreacher couldn't destroy it and it eventually ended up at Grimmauld Place, was stolen by Mundungus Fletcher, confiscated by Umbridge, stolen back by Harry, Ron, and Hermione from the Ministry, and finally destroyed by Ron using the Sword of Gryffindor. The locket tortured Ron while he wore it, whispering that Hermione preferred Harry, that his mother wished he'd died instead of Fred — the Horcrux weaponized love into poison.
A large, heavy gold locket with an ornate serpentine S set in glittering green stones on the front. The chain is thick gold. The locket cannot be opened by force or magic — only Parseltongue, the language of snakes. When worn, it whispers to the wearer, amplifying their fears, jealousies, and darkest thoughts. The Horcrux within projects illusions of the wearer's worst insecurities when threatened with destruction.
Also known as: Slytherin's locket, the locket, Slytherin's Locket