The short story ‘The Diamond Necklace’ was written by-

• The Necklace or 'The Diamond Necklace' is a short story by French writer Guy de Maupassant.
- It is known for its twist ending, which was a hallmark of Maupassant's style.
- The story was first published on 17 February 1884 in the French newspaper Le Gaulois.
- Like most of Maupassant’s short fiction, it was an instant success, and it has become his most widely read and anthologized story. 

• The important characters of this short story:
- 'Mathilde Loisel' (The protagonist of the story)
- 'Monsieur Loisel' (Mathilde’s husband)
- 'Madame Forestier' (Mathilde’s wealthy friend)

Source: Britannica.