It requires companies to examine their supply chains and disclose to the Securities and Exchange Commission (SEC) whether they source tin, tungsten, tantalum, or gold from conflict-mines in the DRC or surrounding countries.

FORBES: Progress Being Made In Eliminating Conflict From Minerals Supply Chains

Still the world's greatest source of diamonds, it is also the world's top-ranked producer of gold, platinum and several other valuable metals.

FORBES: Hitting The Gas