Only minor parts from this Eldorado mine in Canada (907 tons, 0.03% graded) and Colorado could be used, the largest percentage came from the superior Belgish Ko

Only minor parts from this Eldorado mine in Canada (907 tons, 0.03% graded) and Colorado could be used, the largest percentage came from the superior Belgish Kongo Shinkolobwe mine, 65% graded. https://www.bbc.com/future/article/20200803-the-forgotten-mine-that-built-the-atomic-bomb https://www.bbc.com/future/article/20200803-the-forgotten-mi...