precious metal

a metal of the gold, silver, or platinum group. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
precious metal
any of the metals gold, silver, or platinum

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
In addition, they will have to be cheaper: requiring the precious metal platinum would make them expensive.
In commercial cells, the dyes are made of the precious metal ruthenium.
One of the biggest mistakes of the year was to equate precious metal stock funds with gold investing.
Base and precious metal resources are any naturally occurring metallic mineral substances of economic value.
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