Colombia's "green gold": from ethical mines to Cannes festival Gold mining can be a dirty, bloody business, but a village in Colombia has been rewarded for an ethical production model whose clean "green gold" has seduced big international jewelers. The gold ground out of the gray rocks of the Andes in La Llanada is worn by Hollywood stars at the Cannes Film Festival, in creations by Swiss jeweler Chopard. REFILE of voiced AFPTV report ahead of the 69th Cannes film festival, which kicks off on May 11.