In Colombia, mining engineer Rian Mitchell discovers Carrero, the lost emerald mine of the Conquistadors, but has to contend with notorious local bandit El Moro's gang and with coffee planter Catherine Knowland's love.
| Directing | Andrew Marton | Director |
| Writing | Ivan Goff | Writer |
| Writing | Ben Roberts | Writer |
| Sound | Miklós Rózsa | Original Music Composer |
| Camera | Paul Vogel | Director of Photography |
| Production | Armand Deutsch | Producer |
| Editing | Harold F. Kress | Editor |
| Art | Cedric Gibbons | Art Direction |
| Art | Malcolm Brown | Art Direction |
| Editing | Alvord Eiseman | Colorist |
| Directing | Joel Freeman | Assistant Director |
| Sound | Wesley C. Miller | Recording Supervision |
| Art | Edwin B. Willis | Set Decoration |
| Art | Ralph S. Hurst | Set Decoration |
| Crew | A. Arnold Gillespie | Special Effects |
| Crew | Warren Newcombe | Special Effects |
| Costume & Make-Up | Helen Rose | Costume Design |
| Costume & Make-Up | Sydney Guilaroff | Hairstylist |
| Costume & Make-Up | William Tuttle | Makeup Artist |
