#Au__gold__atomic_number_79  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
  supertype:  noble_metal__noblemetal  any metal that is resistant to corrosion or oxidation
  substance of:  gold_foil  gold_leaf  gold  dental_gold  sylvanite
  subtype:  gold_dust  the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining
  subtype:  green_gold__greengold  a gold alloy (at least 14 karat gold with silver or silver and cadmium) that has a green appearance
  subtype:  guinea_gold  22-karat gold from which guinea coins were made

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