Green gold

What is actually "green gold" or "green gold"?

If you search for green gold on Google, you will notice that, on the one hand, you will find the precious metal alloy with a slightly greenish shimmering colour. On the other hand, the term green gold seems to be used in the meantime with the term "green gold" in the sense of fair trade gold. Interestingly, CBD products, i.e. food supplements made from hemp or cannabis, are also referred to as "green gold".

Green gold looked up on Wikipedia

Green gold is a greenish yellow gold alloy without added copper.

The colour is created by approximating the atomic ratio of gold : silver 1:1, which in the optimum case corresponds to a gold content of 646, at which the clearest green hue occurs. Since in this case the silver content is already over 40 %, the colour tone is relatively light. Up to one third of the silver can be replaced by cadmium, which intensifies the green hue, but reduces the favourable tarnishing properties and the melting temperature. The alloys are very soft and not very colourful. Green gold is rarely used, usually e.g. to depict foliage or the like.

Today I asked the OpenAI about green gold

... and got contradictory statements to Wikipedia


Green gold is an alloy of gold and copper, so named because of its green colour. The alloy is often used in jewellery applications because it is more resistant than pure gold and has a unique colour. The exact composition of green gold can vary, but it is usually 75-85% gold and 15-25% copper.

The AI's answer, regarding toxic components in green gold

Yes, in some cases, toxic metals such as cadmium or lead may be present in green gold alloys. To ensure that you do not get toxic metals, you should buy green gold jewellery from a reliable manufacturer who conducts regular tests to guarantee the quality and safety of the jewellery.

What does master goldsmith Markus Wiesner and the jewellery industry know about green gold? 

First of all, a few characteristics:

  • Unsatisfactory green colour
  • Slightly stronger colour with toxic additional metals
  • Rather unattractive as a single jewellery colour
  • If then as a contrasting colour in e.g. Mokume Gane wedding rings

If only gold and silver are alloyed, as described in Wikipedia, the result will be a "soft" precious metal alloy. Its properties have to be improved by adding copper. By the way, this applies to almost all gold alloys used in the jewellery industry and the goldsmith's trade.


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