The Tsar's Diamond (German: Der Diamant des Zaren or Der Orlow) is a 1932 German romantic comedy film directed by Max Neufeld and starring Liane Haid, Iván Petrovich and Viktor de Kowa. It was shot at the Babelsberg Studios in Berlin. The film's sets were designed by the art director Otto Hunte. It is an adaptation of the 1925 operetta The Orlov by Bruno Granichstaedten and Ernst Marischka, previously adapted into the 1927 film of the same title.
In a German car factory a worker named Doroschinsky is in fact a former Russian Grand Duke who fled following the November Revolution and is now living under an alias. When he meets and falls in love with Nadja Nadjakowksa, a beautiful singer and like him a émigré, he decides to sell the one remaining thing of value he has left - the famous Orlov diamond from the former Tsar's sceptre. The sudden reappearance of the valuable treasure leads to the arrival of a confidence trickster who claims that he is the real Grand Duke and the diamond belongs to him.