By I. J. S. Enterprises, 44 pages simple beginners book, chapters on how to use mercury to recover gold, fluxing and firing of gold and silver ore, how to use Aqua Regia to purify gold, how to use nitric acid to purify silver, clean gold, and separate gold and silver dore bars, recovering silver from photograph film, recovering gold and silver from jewelry and electronic parts and gold/silver/gemstone conversion table.
GOLD & SILVER RECOVERY METHODS
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