Every day millions of dollars of emeralds are traded on the streets of Bogota, Colombia's thriving capital city, but few people ever venture to the source of these elusive gems. In this episode, Nagin leads us over treacherous mountain roads deep in the Andes Mountains to explore Colombia's gorgeous but rugged countryside, the lives of its people, and the amazing world of emeralds. Then, it's back to the big city to visit to the hustle of the world's largest emerald district. Minerals featured in this episode: Emeralds.