- Types:
- show 8 types...
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Au, atomic number 79, gold
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
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Pt, atomic number 78, platinum
a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits
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Ag, atomic number 47, silver
a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography
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24-karat gold, pure gold
100 per cent gold
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gold dust
the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining
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coin silver
a silver of the degree of purity established for making legal silver coins
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green gold
a gold alloy (at least 14 karat gold with silver or silver and cadmium) that has a green appearance
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guinea gold
22-karat gold from which guinea coins were made
