The world’s biggest diamond producer may not be the first name that comes to mind in a ranking of top ESG performers. But that’s what the latest industry survey revealed. De Beers scored the highest in London-based Alva’s quarterly rating of environmental, social and governance perceptions this week gleaned from publicly available content from social media to NGO research. The unit of Anglo American Plc snagged the top spot in the first quarter from gold heavyweight Newmont due to an increased focus on equality and sustainability.