Dumbledore found the Resurrection Stone in Harry Potter and the Deathly Hallows .
Harry realizes that Voldemort is seeking ( and shortly afterwards , successfully obtains ) the Elder Wand , won by Dumbledore after Grindelwald 's defeat , recognises the Resurrection Stone as that found by Dumbledore which had become the second Horcrux , and his own inherited Invisibility Cloak as the third Hallow .
Harry Potter and the Deathly Hallows