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Increase the value of gold bearing rocks


Cocacola or vinegar, will remove calcite and reveal gold.
This will take 1 or more days.

This may be more worthwhile than crushing it, as you can sell a beautiful piece for a much higher price than you’d get for the gold (especially accounting for crush-extract-refine work).


A grand suggestion and well worth while as a gold specimen is worth much more than the gold content.


Those rocks are from Canada, I’ve seen it also done to Colorado gold.
Not sure if we have the same types here.