Mwanza’s mine, a ruddy gash on the banks of a small stream whose waters will eventually reach the Congo River, is at the center of one of the world’s most important sources of gem-­quality ...

but another massive gem managed to give it a run for its money after it was dug up in Botswana earlier this week. Anyone ...

Botswana, the world's largest diamond producer, is betting that selling big gems to rich young Americans will ease its economic woes and it is trying to catch their eye via Instagram and TikTok.