Ask The Experts - How clean do my gold concentrates need to be to pour a gold button or bar?
June 2020 by Chris Ralph
Q: I believe I have found a deposit that contains iridium. What can you tell me about iridium? Are there any tests I can do in the field to confirm it is iridium? How much is iridium worth? Where can I get it assayed? Can I refine it myself?
Q: I have tried various leaching techniques from which I cannot get a precipitate.
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