Bornite on Chalcopyrite with Red Quartz and Pyrite Specimen - Brazil

Bornite on Chalcopyrite with Red Quartz and Pyrite Specimen – Brazil (Minas Gerais)

Specimen weight: 71g

Vivid iridescent bornite (Cu₅FeS₄) tarnishing to electric blue-purple, overgrown on chalcopyrite cubes, anchored by deep red quartz with pyrite inclusions. The "peacock ore" effect stems from surface oxidation, while quartz's crimson hue arises from hematite nano-inclusions. Pyrite micro-crystals add golden contrast. Hydrothermally formed in volcanic sulfide veins, this association exemplifies Brazil’s mineral-rich Precambrian terranes. 

Measurement scale in centimeters (cm).