Bornite is known for its iridescent colors, but it's not a single color. It's often described as "peacock ore" because it can display a range of hues including:

* Purple

* Blue

* Red

* Gold

* Brown

The colors change depending on the angle of light and the oxidation state of the mineral. This means that the color you see can change as the bornite weathers and reacts with the environment.