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The control or inspection of precious metals was an ancient concept of examination and marking, by means of inspection stamps (punch marks). The use of hallmarks, at first on silver, has a long history dating back to the 4th century AD—there is evidence of silver bars marked under authority of the Flavius Julius Constans [ 3 ] around AD 350 ...
The loupe also allows you to read any markings (if any exist) regarding gold and silver quality. For example, 10k, 14k, and 18k mean 10-carat, 14-carat, and 18-carat gold, and 925 indicates ...
Where required to be hallmarked, semi-finished precious metal items of art or jewelry pass through the official testing channels where they are analyzed or assayed for precious metal content. While different nations permit a variety of legally acceptable finenesses, the assayer is actually testing to determine that the fineness of the product ...
Swiss hallmarking for other articles such as jewelry and cutlery is optional. In addition to the Swiss hallmark, all precious metal goods may be stamped with the Common Control Mark of the Vienna Convention. Switzerland recognizes platinum, gold, silver and palladium as precious metals which may be hallmarked and thus are subject to assay.
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Look for mint marks, dates, and condition to determine their worth, and keep an eye out for coins from specific eras (think Roman or Civil War-era currency). Paper money with unique serial numbers ...
For example, copper is added to the precious metal silver to make a more durable alloy for use in coins, housewares and jewelry. Coin silver, which was used for making silver coins in the past, contains 900 ‰ silver and 100 ‰ copper, by mass. Sterling silver contains 925 ‰ silver and 75 ‰ of other metals, usually copper, by mass.
The mark for silver meeting the sterling standard of purity is the Lion Passant, but there have been other variations over the years, most notably the mark indicating Britannia purity. The Britannia standard was obligatory in Britain between 1697 and 1720 to try to help prevent British sterling silver coins from being melted to make silver plate .
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