SYNOPSIS

It is beautiful, fascinating, it increases in value every year by 7 to 10%: the emerald has become an interesting investment, superior to gold or diamonds. Research in Colombia, a country that exports more and more every year; hidden networks, from the "guaqueros", bare-handed prospectors, to the owners of the mines, via the traders and clandestine exporters, from intermediary to intermediary, and all paid in cash, net of taxes.