Venezuela is taking its fight over a $1.4 billion arbitral award to the District of Columbia’s federal court of appeals.

The award capped a bitter dispute between Venezuela and Crystallex International Corporation, a Canadian mining company. The fight began in 2002, when Crystallex acquired the rights to develop the Las Cristinas gold deposits in Venezuela. Despite the mining company’s years-long efforts to obtain the necessary permit, Venezuela denied Crystallex the permit in 2008. Later that year, the country announced that it would operate and exploit Las Cristinas itself.