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Gold parting -

parting is the of from silver. and silver are often extracted from the same ores and are chemically similar and therefore hard to . Over the centuries special means of have been invented. The very earliest precious metals had mixes of and silver and silver alloy is called electrum.With the advent of coinage, methods had to be invented to ...

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    Panning | mining | Britannica

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    Automatic Spiral Gold Panning Machines - Fine Gold ...

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