In August 2009 Gold Resource Corporation acquired claims adjacent to the Margaritas property in the Alta Gracia Mining District by filing concessions known as the David 1, the David 2 and La Herradura, totaling 5,175 hectares.
In 2016, surface and underground geological mapping and sampling along with detailed topographic surveying was conducted in the historic mining areas at Alta Gracia. The new information was used for estimation of ore and mineralized material and to guide follow-up drilling planned for Alta Gracia in 2017. Mine permits were granted in October of 2016 and mine development including the improvement of historical mine workings commenced to access previously identified mineralization. The Mirador Mine entered production in 2017.