electrum

[ ih-lek-truh m ]

/ ɪˈlɛk trəm /

an amber-colored alloy of gold and silver used in ancient times.

an alloy composed of about 50 percent copper, 30 percent nickel, and 20 percent zinc.

German silver; nickel silver.

Origin of electrum

1350–1400; Middle English < Latin < Greek ḗlektron amber, alloy of gold and silver

In both cases the name is derived from the pale yellow colour of electrum, resembling that of amber.

Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 |Various
It was of electrum, a kind of brass at this time called the gold of the poor.

Joan of Arc |Lucy Foster Madison
The most ancient Lydian coins are likewise made of electrum.

Troy and its Remains |Henry (Heinrich) Schliemann
Electrum is an alloy of gold and silver, Stannum of lead and silver (see note 33, p. 473).

De Re Metallica |Georgius Agricola

The Lydians began coinage by stamping with a punch each ingot or nugget of gold or silver, or a mixture of them called “Electrum.”

The Swastika |Thomas Wilson

electrum

/ (ɪˈlɛktrəm) /

an alloy of gold (55–88 per cent) and silver used for jewellery and ornaments

C14: from Latin, from Greek ēlektron amber