Precious Metal Refining & Recovery, Episode 3: Karat Gold (2016x16)
Date de diffusion: Fév 13, 2016
I destroy some jewelry and extract the gold from it.
Link for digital copy of book: http://goldrefiningforum.com/~goldref... (Note you need to be a member of the gold refining forum, but its well worth it)
Gold Refining forum: http://www.goldrefiningforum.com/
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