银金矿
Electrum \E*lec"trum\, n. [L., fr. Gr. ?. See {Electric}, and
cf. {Electre}, {Electron}.]
1. Amber.
2. An alloy of gold and silver, of an amber color, used by
the ancients.
3. German-silver plate. See {German silver}, under {German}.
electrum
n : an alloy of gold and silver