A Ukrainian graphite mine shows how Trump may be overestimating how much he can get from the war-torn country

Graphite-rich rocks at the Zavallivsky mining complex are a valuable resource for Ukraine, as it was to the Soviet engineers who began excavating here in the 1930s. Graphite-rich rocks at the Zavallivsky mining complex are a valuable resource for Ukraine, as it was to the Soviet engineers who began excavating here in the 1930s. The U.S. wants Ukraine's rare minerals. Digging them up is a whole other matter Mining engineer Valerii Kharkovets walked carefully along a gravel path at the bottom of a giant quarry in central Ukraine, stopping to pick up a small rock. It was filled with glittering…