Diamond firm pays £4.3m over human rights abuses by contractors
Pandora to only use lab-made diamonds
How Tiffany is using traceability to raise ethical standards
Tiffany & Co aims for diamond supply chain transparency
The average artisanal miner digs three bags a day © Getty
E-tagging and selfies to prove provenance
Artisanal mining employs more than 1.5m people in developing countries ©123RF
De Beers trials app to verify artisanal diamonds
Biggest diamond mine begins production