a form of brass, an alloy of copper and zinc, mixed in proportions so that it closely resembles gold in appearance. It was invented in the 18th century by Christopher Pinchbeck, a London clockmaker. Since gold was only sold in 18-carat quality at that time, the development of pinchbeck allowed ordinary people to buy gold 'effect' jewellery on a budget. The inventor allegedly made pinchbeck jewellery clearly labelled as such. Pinchbeck jewellery was used in places like stagecoaches where there was a risk of theft. Later dishonest jewellers passed pinchbeck off as gold; over the years it came to mean a cheap and tawdry imitation of gold.
Pinchbeck is typically composed of copper and zinc in ratios of 89% copper to 11% zinc; or 93% copper to 7% zinc.
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Coggan carried an old pinchbeck repeater which he had inherited from some genius in his family; and it now struck one. He lighted another match, and examined the ground again.
Thomas Hardy. Far from the Madding Crowd (1874)
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a pinchbeck locket containing a strand of some long-dead baby’s hair
George Orwell. 1984 (1949)
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they happen to have paid forty or fifty dollars for a fac-simile of her diamond ring—a fac-simile made out of real pinch-beck and unquestionable paste.
Edgar Allan Poe. The Works of Edgar Allan Poe — Volume 4: Diddling (1843)