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https://www.answers.com/Q/AU_on_jewelry
May 15, 2009 · "Au" means gold (from the Latin aurum) What is the percentage of pure gold in 14kt gold?
https://www.quora.com/What-does-AU-mean-on-a-ring
Au is the chemical symbol for Gold. Therefore, it means the ring is made of gold. But I can say that the this kind of mark is rare. More commonly gold rings are stamped with 9k, 14k , 18k , or 22k. Another stamp for gold is 750 which indicates 18k or 585 stands for 14k and 375 for 9k. 1.3K views.
https://findanyanswer.com/what-does-au-mean-for-gold
Apr 06, 2020 · "Au" is the symbol for gold on the periodic table and is used in the marking "Au750". The " 750 " specifies that a piece of jewelry is 18 karat gold . 585 simply means 14K gold . It is 585 gold parts per 1000 parts of the alloy.
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