Underwater diamond mining already exists. Mighty Ships did an episode about it: http://www.smithsonianchannel.com/shows/mighty-ships/peace-in-africa/809/3399768

Underwater diamond mining already exists. Mighty Ships did an episode about it: http://www.smithsonianchannel.com/shows/mighty-ships/peace-in-africa/809/3399768 http://www.smithsonianchannel.com/shows/mighty-ships/peace-i...