Platinum, a precious metal, is used in catalytic converters.
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Platinum
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Silver is the precious metal that "soft-money" advocates
demanded be coined again to compensate for the Crime of '73. It was
the demonetization of silver enacted by the Coinage Act of
1873.
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No, zinc is not a precious metal. It is a necessary industrial
metal.
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iradium is the precious metal element apart from platinum