Nonetheless, it is usually extracted from direct-zinc, copper, gold and copper-nickel ores for a by-products of mining for these metals. The metal is recovered either in the ore, or in the course of the electrolytic refining of copper. Earth output is about twenty,000 tonnes per year. Assist text not available https://erickwchmq.wikicarrier.com/91571/facts_about_aufen_revealed