Chalcopyrite is the same chemical formula as Pyrite, but with added Copper. It has a bright, brassy colour compared to Pyrite which tends to be more dull, and is often acid treated to form the colourful crystals sold as 'Peacock Ore'.

Chalcopyrite encourages creative expression, helps to remove self-imposed obstacles, and promotes happiness and joy. It also helps to live in the moment and balances the left and right sides of the brain. Chalcopyrite is often used as an effective aid for grief.