how much gold is in bornite

Dec 07, 2017 8th Dec 2017 11:34 UTCReiner Mielke Expert. Bornite will tarnish blue in air ( within a week) without any special treatment, chalcopyrite on the other hand must be artificially acid treated.The simplest way is to chip off a tiny piece and observe the color. Chalcopyrite will be a bright gold color and bornite …

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