Not the biggest nugget in the world :) - Page 2
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  1. #16
    Mar 2018
    Near Baltimore
    84 times
    Quote Originally Posted by mikep691 View Post
    We learned to inspect all the black rocks that just won't leave the gold in the pan. We get what we call black nuggets occasionally. Gold with a reddish hue usually indicates copper. The northeastern areas in California had a lot of copper mines with a co-product of gold.
    I've read that HCL dissolves manganese dioxide, so I'm planning to dump cup of my concentrate into HCL to test this.
    KevinInColorado likes this.


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