The Diamond Queen (1921)

Doris Harvey is just returning to her New York home from a fashionable girls' school, when she learns of her father's financial ruin. John Harvey, a diamond importer, operating individually, has been crushed by a powerful diamond syndicate. He cannot stand the thought of failure and rushes home to kill himself. Doris, after a wild dash in an automobile, assisted by a young man named Bruce Weston, reaches her father's side just after the fatal shot was fired. Bruce Weston is a member of the diamond syndicate, but was not a party to the ruin of Harvey. He falls in love with Doris and assists her in fighting the gang sent by the syndicate to obtain incriminating papers left by her father. The trend of events takes all of the principal characters to the diamond mines of Africa. Doris is captured by natives in the jungle and set up as their ruler.