Is selling Canadian diamonds a solution to the human-rights problems that have surrounded parts of the African diamond industry? Or is it a feel-good measure that ultimately hurts African miners and citizens?.."Brilliant Earth offers diamonds that are individually tracked to their origin in Canada, which has very strict labor and environmental standards," said [co-founder Beth] Gerstein... But Brilliant Earth's business model is catching flak from...activists who monitor the rights of African diamond miners... [H]uman-rights activists say more must be done to improve working conditions of African miners -- but avoiding African diamonds isn't the way to do that.