It is an industry that was supposed to be cleaned up, after the turn-of-the-millennium­ notoriety surrounding so-called blood or conflict ­diamonds—precious stones mined in African war zones ...

because of "ethical sourcing and sustainability compared to natural diamonds, given the concerns around blood diamonds." ...

Blood Diamonds is a made-for-TV documentary series, originally broadcast on the History Channel, that looks into the trade of diamonds which fund rebellions and wars in many African nations.