1) Diary of Tom Riddle: Destroyed by Harry Potter with a Balisk fang in book 2.
2)The ring of Marvolo: Destroyed by Albus Dumbledore with the sword of Goddoric Gryffindore, but not before he was fatal wounded by attempting to use the ring. It is given to Harry by Dumbledore hidden inside the golden snitch. It also happens to be the second of the Deathly Hallows.
3)The Locket: Stonlen by Regulas Arcturus Black and given to Kreacher to destroy. Stolen from Kreacher by Mundungus Fletcher. Stolen from Mundungus Fletcher by Dolores Umbridge. Stolen from Dolores Umbridge by Harry Potter and Hermione Granger, and destroyed by Ron Weasly with the sword of Goddoric Gryffindore.
4)The cup of Helga Hufflepuff: Hidden in the Lestrange vault by Bellatrix Lestrange. Stolen from Gringots by Harry Potter. Destroyed by Hermione with a Balisk fang from the chamber of secrets.
5)The Diadim of Rowena Ravenclaw: Hidden in the room of requirement. Destroyed by Crabbe's Fiendfyre (accidentally, which happens to kill Crabbe too).
6)Nagini, the snake: Beheaded by Neville Longbottom with the sword of Godoric Gryffindor, pulled from the sorting hat after Voldemort summons that hat onto Nelville's head and sets in on fire as an example.
7)Harry Potter: Destroyed unwittingly by Voldemort with the Avada Kedrava curse when he "kills" Harry Potter.