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 ...

"Real diamond gives the feeling that it is ... given the concerns around blood diamonds." However, there's not much solid ...

"avoid the risk of confusing 'blood diamonds' or diamonds of unknown origin with those from countries such as Botswana, where mining processes are subject to strict environmental and political ...