This coin is engraved after the Aztec Sun Stone, a representation of the five eras of the sun from Aztec mythology. After the Spanish conquest, the monolithic sculpture was buried in the Zócalo, the main square of Mexico City. It was rediscovered on 17, December 1790 during repairs on the Mexico City Cathedral. The reverse features our Moon's surface texture at a geographically (technically it's selenographically) correct 91,196,160:1 scale. This heavy brass worry stone feels good in the hand and the pocket. The thick brass coin blank is pre-tumbled before minting for a smooth edge and then given an antiqued finish. Each Sun and Moon coin comes in its own wax-sealed packaging with facts about the art of the Sun Stone, a substantial artifact that gives us a better understanding of the historically significant Aztec peoples.