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Prince Rupert's metal

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noun
a brass composed of from about 60 to 85 percent copper and about 15 to 40 percent zinc, used to imitate gold.
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Also called Prince's metal.

Origin of Prince Rupert's metal

First recorded in 1690–1700
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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