As the centre of the diamond polishing trade, [Surat, India] processes 92 per cent of the world's stones in foul sweatshops and state-of-the-art factories... [An] investigation by The Observer has uncovered a damning consequence [of India's diamond trade] - evidence of the sale of blood diamonds on the black market from the Ivory Coast and Liberia, both banned from trading by the UN... Campaigners say [India] continues to ignore Dickensian working conditions and the use of child labour [among diamond polishers].