Electrum

<p>Electrum is a naturally occurring <a href="/facts/Alloy/I7w7WQWR">alloy</a> of <a href="/facts/Gold/1znknojp">gold</a> and <a href="/facts/Silver/xXe41BGg">silver</a>, with trace amounts of <a href="/facts/Copper/I8PEE8oX">copper</a> 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 "<a href="/facts/Colored_gold/B1gj1kqS">green gold</a>".
</p><p>Electrum was used as early as the third millennium BC in the <a href="/facts/Old_Kingdom_of_Egypt/3Egn5RJd">Old Kingdom of Egypt</a>, sometimes as an exterior coating to the <a href="/facts/Pyramidion/UsFBe6lH">pyramidia</a> atop <a href="/facts/Ancient_Egypt/BDsEGK4g">ancient Egyptian</a> <a href="/facts/Pyramid/76Qx8TLD">pyramids</a> and <a href="/facts/Obelisk/L2VkHv7j">obelisks</a>. It was also used in the making of ancient <a href="/facts/Beaker_(archaeology)/A73VLL69">drinking vessels</a>. The first known metal <a href="/facts/Coin/lgpMPxrB">coins</a> made were of electrum, dating back to the end of the 7th century or the beginning of the 6th century BC.
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Electrum open-in-new

Electrum