- Chalcopyrite on Pyrite with Quartz and Dolomite
- Small Cabinet, 5.3 x 5.3 x 4.5 cm
- Concepcion del Oro, Zacatecas, Mexico
- Ex. David and Emily Stoudt
A Chalcopyrite twin crystal sits perched on Pyrite with accents of Quartz and (maybe?) Ankerite, though the Ankerite could be just a ferroan Dolomite and has not yet been tested in a lab. The high luster of the modified Pyrite crystals juxtaposes the patinaed Chalcopyrite crystal. Similar to Cornish examples, a few nicks in the superficial oxidation coating reveal the metallic golden color below. A truly showy example of sulfide minerals from Zacatecas.