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Tuesday, December 7, 2010

GOLD


While pure gold is yellow in color, colored gold can be developed into various colors. These colors are generally obtained by alloying gold with other elements in various proportions. However each type of colored gold has a combination of some thing Green gold, leaving the copper out of the alloy mixture and just using gold and silver make alloys. It actually appears as a greenish yellow rather than green. Eighteen karat green gold would therefore contain a mix of gold 75% and silver 25%.

Green gold was known as Lydian’s 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 color of green gold is achieved when raising the silver: gold ratio of the alloy. However, Green gold is, however, more malleable than red or yellow gold, but less durable.

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