Precious copper (noble copper)

In the technical language of the jewelry sector (jewellery industry), all items consisting of only one third gold (gold 333; 8 carat); the rest of the mass is made up of copper, silver, nickel and other metals or metal mixtures. Nevertheless, in Germany – in contrast to the regulations in almost all other countries – such goods may be called “gold” and jewelry made of them may be marked with the fineness stamp “333”. In accordance with EU-wide
However, it is foreseeable that this alloy will be replaced by the internationally used minimum standard gold 375 (9 carat). – See precious metals, one-third gold, noise gold, intermediate gold.

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University Professor Dr. Gerhard Merk, Dipl.rer.pol., Dipl.rer.oec.
Professor Dr. Eckehard Krah, Dipl.rer.pol.
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