The Vanished Diamond, also translated as The Southern Star (French: L'Étoile du sud, lit.

The Star of the South), is an 1884 French novel credited to Jules Verne, based on an uncredited manuscript by Paschal Grousset.

Midway through the banquet, the diamond vanishes as well as Victor's African hired help, Mataki.

Victor brings along two companions his laundry man, Li, and a member of his digging team, Bardik.

Victor returns to Griqualand and finds the diamond in the stomach of Alice's ostrich, Dada.

Cyprien is almost hanged because his discovery of making artificial diamonds threatened the livelihood of the miners.

Mataki found the diamond when he was covered by the landslide and stuck it in Victor's experiment in gratitude.

The original manuscript of the novel, titled "L'Étoile du Sud : Aventures au pays des diamants" ("The Southern Star: Adventures in the Land of Diamonds") was written by the novelist and activist Paschal Grousset under the pseudonym Philippe Daryl.

The publisher Pierre-Jules Hetzel bought the manuscript and assigned it to Jules Verne for revisions.