For mixed ores such as chalcopyrite/chalcocite chalcopyrite is recovered without collector, while some non xanthate collector may be required to recover chalcocite.

A few days later, chalcocite was also discovered in the same location.

The main copper-bearing mineral is chalcocite; it occurs mainly as a replacement of plant fragments.

o Today, copper is primarily obtained from the ores cuprite (CuO2), tenorite (CuO), malachite (CuO3·Cu(OH)2), chalcocite (Cu2S), covellite (CuS) and bornite (Cu6FeS4).

In the lower parts of these cliffs and on the slopes in front of them, copper-rich nodules (up to 55% copper) mainly of malachite and chalcocite, were mined in ancient times.