A massive sulfides specimen containing bornite and/or chalcopyrite (cannot be easily distinguished when intergrown). A patch of green oxidation product - probably malachite - is also present. The 'peacock ore' aspect of the bornite/chalcopyrite could be brightened by chemical treatment, but this would certainly destroy the malachite. Such cleaning is inadvisable as the malachite part of the natural mineral paragenesis.