The Lost Tribe (1949)

Jungle Jim rescues a beautiful native girl, Li Wanna, who is being chased by two sailors. She comes from a hidden village and the men were using her to find it. Jim visits the village and learns they are rich in diamonds. The village elder gives Jim a bag of diamonds which he wants delivered to the men looking for them. A bag of diamonds will not satisfy them however. Along the way, Jungle Jim faces several challenges.