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methods of gold refining

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    Gold (Au), chemical element, a dense lustrous yellow precious metal of Group 11 (Ib), Period 6, of the periodic table. Gold has several qualities that have made it ...

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    Gold does not exist in nature in the same form that it is in jewellery that we buy. It often occurs as grains, flakes, masses or veinlets in rocks.

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    Gold (Au), chemical element, a dense lustrous yellow precious metal of Group 11 (Ib), Period 6, of the periodic table. Gold has several qualities that have made it ...

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