Electrum
Alloy of gold and silver / From Wikipedia, the free encyclopedia
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Not to be confused with Electron.
This article is about the metal alloy. For the sculpture, see Electrum (sculpture). For the particle consisting of a positron and electron, see Positronium. For the gemstone, see Amber.
"Green gold" and "Greengold" redirect here. For the color, see Green-yellow. For the Israeli figure, see Zvika Greengold.
Electrum is a naturally occurring alloy of gold and silver,[1][2] with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially and is also known as "green gold".[3]
Electrum was used as early as the third millennium BC in the Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks. It was also used in the making of ancient drinking vessels. The first known metal coins made were of electrum, dating back to the end of the 7th century or the beginning of the 6th century BC.