CHALCOPYRITE QUARTZ, HUARON, SAN JOSE DE HUAYLLAY DISTR. CERRO DE PASCO, PERU (small cabinet)

Chalcopyrite is a mineral composed of copper, iron, and sulfur, recognized as the primary source of copper ore. Its chemical composition is represented by the formula CuFeS2, and it crystallizes within the tetragonal system. The mineral exhibits a brassy to golden yellow hue and possesses a hardness rating of 3.5 to 4 on the Mohs scale, with a distinctive green-tinged black streak.

Private Peruvian Collection. Very rare as the mines closed decades ago. Former Steve Moon Collection.