Question: what are all seven horcruxes?
Answer: Tom Riddle's diary. ... 
Marvolo Gaunt's Ring. ... 
Salazar Slytherin's Locket. ... 
Helga Hufflepuff's Cup. ... 
Rowena Ravenclaw's Diadem. ... 
Harry Potter (unknown to Voldemort until after he had destroyed it). ... 
Nagini the Snake.