DiCaprio brought the issue to the screen - blood diamonds, secured by genocide or crimes against humanity and the tribes of Africa.
How about Blood Gold - we all have gold jewelry.
National Geographic, January 2009, page 51: 25% of all gold produced world wide - from the same sorts of mines and sites as the blood diamonds.
While you criticize the diamond wearer, and attack US policies for not acting (and we should) ... you wear gold.
Have a nice day.
gold