Can consumer power make space for small miners in the jewellery supply chain?

Good governance of the extraction of precious metals and natural resources has come to prominence in recent years after much-publicised abuses occurred in countries including the Democratic Republic of Congo, where rebel groups – often in collusion with government elites  – exploit natural resources at grave human and environmental cost.
http://www.theguardian.com/sustainable-business/2015/jan/13/small-miners-jewellery-supply-chain