Prince of Diamonds.

Eve Marley (Aileen Pringle)is forced to marry a wealthy jeweler that she does not love in order to save the man she loves, Rupert Endon (Ian Keith), from being unjustly arrested as a thief. Rupert, unaware of the reason his sweetheart married his rival, goes to the Far East where he grows rich after discovering a diamond mine. He breaks Eve's husband by underselling him and then returns to England to exact his revenge on the woman he thinks did him wrong.