Luzonite is a rare mineral that is dimorphous with Enargite. Luzonite forms in tetragonal crystals, while Enargite forms in orthorhombic crystals. Luzonite and Enargite sometimes form together in single altering crystals with different symmetry and cleavage habits. Luzonite is named after its occurrence in Mancayan, Luzon Island, in the Philippines, which is the type locality for this mineral.
Luzonite is not a common mineral, and good examples are found in only a few localities. The best examples of this mineral come from Taiwan at the Jinguashi Mine, Ruifang District, New Taipei City. Well-formed Luzonite microcrystals come from the Clara Mine, Oberwolfach, Baden-Württemberg, Germany. The original occurrence of this mineral is from the Lepanto mine, Mankayan, Luzon Island, Philippines.
