It's a strange day when I don't sell a piece of chalcopyrite. There are a handful of minerals that sell far more then any other. Three or four calcite types, iron pyrite, and chalcopyrite.
The form I sell is technically bornite, which has a higher concentration of copper. Usually chalcopyrite has a brassy yellow colour and is almost always massive rather than crystalline. Bornite, with the extra copper, is a lot more colourful. The vivid blues, purples and aqua greens have earned it the common name peacock ore.
Like malachite, though, it is an important copper ore and is usually crushed up for the copper. Seems a shame, but it's also good to have running water and electricity, too.
I found some bornite once. I think it was during my mapping project up in the North of Scotland. I didn't put it on my map. I had more important things to do. Vast, foot-sucking bogs don't map themselves you know.
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