any of the less common and valuable metals often used to make coins or jewelry
noun
a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia
a gold alloy (at least 14 karat gold with silver or silver and cadmium) that has a green appearance
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