Chalcopyrite

Chalcopyrite is copper iron sulfide, the most important copper ore mineral and highly sought after by collectors for its distinctive brassy-yellow coloration and iridescent tarnish. This tetragonal mineral characteristically exhibits brilliant metallic luster and often displays rainbow-colored oxidation films (peacock ore coloration). Chalcopyrite specimens range from pristine yellow crystals to heavily oxidized pieces displaying spectacular iridescent surface colors that attract collectors at all levels.Chalcopyrite occurs in deposits worldwide, including Peru, Chile, Canada, the United States, and Mexico. This mineral forms in diverse geological environments: hydrothermal veins, magmatic systems, and as primary ore in porphyry copper deposits. Exceptional specimens come from Peru’s Peruvian copper belt, Canadian deposits in British Columbia, and various United States localities. The iridescent tarnish phenomenon that creates peacock ore appearance is particularly prized by collectors.Discover our chalcopyrite collection featuring specimens with pristine yellow crystals and spectacular iridescent tarnish. Our selection showcases the full range of chalcopyrite’s visual appeal, from untarnished specimens to prized peacock ore examples. Browse chalcopyrite samples and add these copper sulfides to your collection today.