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16+
Francois Pellier
Izlasei
Pievienots
Full HD
8 minūtes
The video blog focuses on the chemistry of various precious metals and much more. Under different headings, you can watch videos on how the author purifies and determines samples of initial contacts in order to extract silver 920. He also tells how to determine gold in quartz-pyrite gold-bearing ores, create the legendary red gold 585, and more.