QUESTION: "I have three pieces of what is labelled as Peacock Ore, beautiful stone like coal, but with the brilliant iridescent blues and greens and purples of peacock feathers. Can you tell me anything about it?"
MY ANSWER: That most likely would be chalcopyrite. Chalcopyrite is known as Peacock Ore or Peacock Rock. It also comes with golden and green looking sparkly iridescence too, but that's not seen as often as the blues and pinks and greens.
Originally posted at CrystalsAndJewelry.com 2005. Updated January, 2013.