Snatch

After stealing an 86-carat (17.2 g) diamond while dressed as an ultra-Orthodox Jew during a heist in Antwerp, Franky "Four-Fingers" goes to London to see diamond dealer Doug "The Head" on behalf of New York jeweller and Jewish-American organized crime figure "Cousin Avi". One of the other robbers advises Franky to obtain a gun from his brother, arms dealer and ex-KGB agent Boris "The Blade", then later calls Boris and encourages him to steal the diamond from Franky before he can turn it over to Doug.