rolled gold

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rolled gold

a metal, such as brass, coated with a thin layer of gold, usually of above 9 carat purity. It is used in inexpensive jewellery
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

rolled gold

[′rōld ′gōld]
(metallurgy)
A metal or alloy of low value covered by a layer of gold alloy where the proportion of gold alloy to total weight of the article may be less than 1:20 and fineness of the gold alloy may not be less than 10 karats.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.