The Moonstone is a 1934 American mystery film directed by Reginald Barker and starring David Manners, Phyllis Barry, Gustav von Seyffertitz and Jameson Thomas.

The film retains the book's British location, but uses a contemporary 1930s setting rather than the Victorian era of the original.

Inspector Cuff is commissioned by Scotland Yard to ensure that the Moonstone, which has just arrived in the country, is kept safe.

The Moonstone is in the possession of Franklin Blake, who arrives at the Vandier Manor to deliver the jewel to his fiancée Ann Verinder.

The adaptation of a prestigious British Victorian novel marked a break from their usual films which were generally cheaply made American-set Westerns.