A license to mine fire clay near the Donetsk front line sold for 2,362 times the asking price Friday. The difference came when the State Geology and Subsoil Service innovated and sold the license through an electronic auction. The license to mine the Klishchiivka deposit, midway between Kramatorsk and the front line, went for $1,481,481 – far above the starting price of $627. Refractory clays are used to make ceramics and fire bricks.