bornite bornite has a brown to copperred color on fresh surfaces that tarnishes to various iridescent shades of blue to purple in places. its striking iridescence gives it the nickname peacock copper or peacock ore.. mineralogy. bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with the more common chalcopyrite.
c2c g corp. announces expansion of newfoundlandmay 27, · tom joe and rocky brook acquisition highlights 100% interest in two mineral licenses (ten claims) covering the tom joe garsenic occurrence withchalcopyrite mineral uses and propertieswhat is chalcopyrite? chalcopyrite is a brassyellow mineral with a chemical composition of cufes 2.it occurs in most sulfide mineral deposits throughout the world and has been the most important ore of copper for thousands of s.. the surface of chalcopyrite loses its metallic luster and brassyellow color upon weathering. it tarnishes to a dull, graygreen color, but in the presence of
chalcopyrite chalcopyrite (/ ˌ k æ l. k ə ˈ p aɪ ˌ r aɪ t,k oʊ/ kalkəpyryte, koh) is a copper iron sulfide mineral and the most abundant copper ore mineral. it has the chemical formula cufes 2 and crystallizes in the tetragonal system. it has a brassy to gen yellow color and a hardness of 3.5 to 4 on the mohs scale.its streak is diagnostic as green tinged black. on exposure to air