Burundi's mining sector was thrust into prominence last month when the US said it was one of those it was considering to diversify its sources of rare earths.
In the diamond trading world, becoming one of De Beers' elite buyers is viewed as essential to achieving success and making money. Now, it’s no longer so easy.
As declining ore reserves push mines to greater depths and also to remote locations, companies are increasingly testing wearables to cut costs, decrease risk and drive productivity.