Diamonds is a 1975 Israeli-American heist film. Robert Shaw stars in a dual role as twin brothers. Richard Roundtree, Barbara Hershey and Shelley Winters are co-stars. The film was also released as Diamond Shaft, although it has no relation to the Shaft films other than having Roundtree in the cast.
Charles Hodgson is a British aristocrat who decides to become a thief as a way of getting at his twin brother, Earl, a security expert who has built a supposedly impregnable vault in Tel Aviv, which holds a cache of diamonds. For the caper, Charles enlists Archie, a heist expert, and Sally. He also becomes acquainted with an American woman, Zelda Shapiro, who is in Israel looking for a new husband.