underthescopemineral: Chalcopyrite Cu1+Fe3+S2 Locality: Interst…

underthescopemineral:

Chalcopyrite

Cu¹⁺Fe³⁺S₂

Locality:

Interstate 691 and State Route 10 Interchange, Cheshire, New Haven Co., Connecticut, USA

Field of View: 2.5 mm

Iridescent chalcopyrite on datolite.

David L. Busha’s Photo

Chalcopyrite is a major ore of copper. A primary mineral in hydrothermal veins, stockworks, disseminations, and massive replacements; an exsolution product in mafic igneous rocks; of sedimentary origin controlled by redox conditions. 

Geology Nerd