Gold mines and refinning in Colombia by Diego Giudice
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24. 69146.JPG24 of 30
The second melting of a raw gold and silver bar to get a more refined product suitable for export, Medellin, Colombia
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24. 69146.JPG24 of 30
The second melting of a raw gold and silver bar to get a more refined product suitable for export, Medellin, Colombia
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