New Mexico State Quarter Collection features one quarter each from the Denver (D) and Philadelphia (P) mints, double-plated with 24-karat gold. New Mexico is the second State Quarter of 2008, and the 47th state to enter the Union. A graphic map of New Mexico details the peaks, valleys and river systems. Overlaid on this map shows the Zia sun sign, which is a circle with four points radiating from it in four directions, representing prosperity and happiness. New Mexico's nickname, The Land of Enchantment, is prominently displayed below the state.