"A Diamond Guitar" is a short story by Truman Capote, first published in Harper's Bazaar in 1950; it is noted as one of his better quality early short stories. The title refers to the prize possession of the younger man, a rhinestone-studded guitar; the guitar serves as the key image of the story. Capote wrote "A Diamond Guitar" in April 1950 during a three-week-long transatlantic freighter crossing from New York to Italy. It is one of three short stories normally published in the same volume as Breakfast at Tiffany's, first released in 1958.