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Chalcopyrite (Yellow Copper) is a common mineral and is found in almost all sulfide deposits. Chalcopyrite is often confused with pyrite, although the latter has a cubic and not a tetragonal crystal system. Further, chalcopyrite is more often massive and less brittle. Chalcopyrite is also a darker yellow in color.
CuFeS2 - Copper Iron Sulfide
Class:
Brass-yellow, tarnishes iridescent
Green-black
Metallic
Opaque
4.3
3.5 - 4
Imperfect
Uneven
Tetrahedral crystals, botryoidal aggregates, massive.
Non-fluorescent
Frequency:
Common
Origin:
Magmatic, hydrothermal and sedimentary, in association with sphalerite, galena, tetrahedrite, pyrite and many other sulfides.
Occurence:
Banská Stiavnica, Slovakia; Cavnic, Romania; Huanzala & Huaron, Peru, Bisbee, Arizona, USA; Missouri, USA; Sudbury, Ontario, Canada; Rio Tinto, Spain.
Application:
Copper ore, mineral specimen

 
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