Peacock ore, or Chalcopyrite, pronounced kal-co-pie-right (kal as in "calendar", "co" as in coat), is a copper iron sulfide mineral that crystallizes in the tetragonal system. The name "Chalcopyrite" is derived from the Greek words chalkos, "copper" and pyrites, "strike fire". It is normally brass yellow but may have a purplish blue tarnish. The tarnish can produce a colorful, metallic iridescence and as a result it is often called "peacock ore."
Chalcopyrite is opaque and can be treated with acid to produce a greater tarnish. Chalcopyrite is present in volcanogenic massive sulfide ore deposits and sedimentary exhalative deposits, formed by deposition of copper during hydrothermal circulation. It is concentrated in this environment via fluid transport. Chalcopyrite is the most important copper ore, and it occurs in a variety of ore types, from huge masses as at Timmins, Ontario, to irregular veins and disseminations associated with granitic to dioritic intrusives as in the porphyry copper deposits of Broken Hill, the American cordillera and the Andes. Chalcopyrite is present in the supergiant Olympic Dam Cu-Au-U deposit in South Australia. It may also be found in coal seams associated with pyrite nodules, and as disseminations in carbonate sedimentary rocks.
The energy of Peacock ore is power and is associated with the Crown Chakra. This mineral increases your perceptive abilities. It assists you in pulling ethereal energy to bring information to you and others. Peacock ore is useful for crystal healing and energy work. It enhances inner knowing, strengthens perception and helps you trust what you see psychically. It is also good for Tai Chi, acupressure, acupuncture and other practices that move Chi and break up energy blockages. It aligns the body's cellular structure, eliminates toxins, promotes hair growth, heals bronchitis and lung disorders, can help heal and protect from infectious diseases, fevers and inflammation. Peacock ore can be used to break up energy blockages and can open up and cleanse the Crown Chakra. It makes an excellent meditation stone.
Color: Brassy yellow, tarnishes to iridescent blues, greens, yellows and purples.
Transparency: Crystals are opaque.
Crystal System: Tetragonal; bar 4 2m
Crystal Habits: Predominantly the disphenoid which is like two opposing wedges and resembles a tetrahedron. Crystals sometimes twinned. Also commonly massive, and sometimes botroyoidal.
Cleavage: Rather poor in one direction.
Fracture: Conchoidal and brittle.
Hardness: 3.5 - 4
Specific Gravity: Approximately 4.2 (average for metallic minerals)
Streak: Dark green.
Other Characteristics: Some striations on most crystal faces.
Associated Minerals: Quartz, fluorite, barite, dolomite, calcite, pentlandite, pyrite and other sulfides.
Best Field Indicators: Crystal habit, tarnish, softness and brittleness.