Gold mining can be a dirty, bloody business, but a village in Colombia has been rewarded for an ethical model - producing clean "green gold", which 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.

The La Llanada operations were certified in October by Fairmined, an international body that certifies ethical mining practices. That opened the way for it to sell its gold to international companies.