Gold Resource Corporation is a mining company. The Company is a producer of metal concentrates that contain gold, silver, copper, lead and zinc, and dore containing gold and silver at the Aguila Project within its Oaxaca Mining Unit located in the southern state of Oaxaca, Mexico. The Company has two units in North America, the Oaxaca Mining Unit and the Nevada Mining Unit. The Company's mineral properties are classified into two categories, such as Operating Properties and Exploration Properties. As of December 31, 2016, the Company had interest in nine properties, where over six of its properties, including one Operating Property and five Exploration Properties, are within its Oaxaca Mining Unit, which is located in the southern state of Oaxaca, Mexico. As of December 31, 2016, the Company also had three Exploration Properties within its Nevada Mining Unit located in south central Nevada's Walker Lane Mineral Belt in the United States.