Gold, Quartz, Pyrite, Chalcopyrite, Hematite, Epidote
Bira, Zaruma, Zaruma Canton, El Oro Province, Ecuador
Specimen collected by Wilson Bonilla (retired geologist that worked on the mine), he used this sample to teach the internship students to identify native gold, but he gave it to me, because he was going to retire. The are also more minerals like pyrite (most of the crystals are covered by a black tarnish), chalcopyrite ( coverd with a black or ...