Many countries have gold and silver 'bullion' coins. Have any of these ever increased in value well beyond its precious metal content? - Quora
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Environmental impact of high-value gold scrap recycling | The International Journal of Life Cycle Assessment
Why hasn't the discovery of asteroids full of trillions of dollars worth in gold and other precious metals caused their value to plummet? - Quora
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PDF) An investigation of trends in precious metal and copper content of RAM modules in WEEE: Implications for long term recycling potential
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