Green gold is not really green. Green gold normally appears as a very subtle, greenish yellow tint rather than what we would normally call green. Blending of silver and pure gold produces the colour tone found in green gold and that we call green gold alloy. Green gold alloy is made by reducing the copper content from an alloy mixture and using just gold and silver. Green gold was known to Lydians from around 2,900 years ago. They knew it as electrum. The ancient Greeks called it gold or white gold, as opposed to refined gold. The greenish colour of green gold is achieved when raising the silver:gold ratio of the alloy. Green gold has been created by a patination technique on copper-containing carat gold alloys. The classic mixture that produces green gold is an alloy of pure yellow gold and pure silver -- though, for rings, harder metals such as zinc are used to make the gold more durable.
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