FARAI SHAWN MATIASHE AT first glance the Zimbaqua mine in Zimbabwe looks normal: a series of shallow craters dotted with workers in overalls and hard hats toiling to unearth the treasures below. But a closer look reveals something unusual. In an industry dominated by men, everyone working to unearth prized aquamarine gems from the yellow soil is a woman. "I no longer have to bother the father of my children because I am paying school fees for the two of my children who are in primary school," said Shupi Kabudura, 33, who became a miner after fleeing an abusive husband…