What to do with the mudd. Reverse electroplating
Put your mud, in a glass pyrex container add 3 parts muriatic acid and 1 part nitric acid, heat about 300'' degrees for about 3 hours then filter it off, add water, kill the acid with urea. Then add, dissolved in water ferrous sulfate to it let Stan over night, to precept the gold, this method will give you fine gold.