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Aug 04, 2015 · The numbers 750 stamped on jewelry means that it is 18-karat gold. The jewelry piece is 18 parts pure gold and six parts metal alloy. One hundred percent gold jewelry is 24 karats. Unfortunately, pure gold isn't very durable, so jewelers add stronger metals to it to keep it from denting.
https://bellatory.com/fashion-accessories/750-585-417-gold-markings-jewelry
Mar 11, 2020 · Answer: Au is the symbol for gold on the periodic table, and 750 means the jewelry is 18 karat gold. So this stamp is just another way of indicating that the jewelry is 18K gold. So this stamp is just another way of indicating that the jewelry is 18K gold.
https://www.reference.com/world-view/750-jewelry-mean-9a55e32eb8e22e47
Aug 04, 2015 · A 750 mark on jewelry means that the metal alloy used to make the jewellery contains 75 percent gold or another precious metal. Most precious metals used in jewelry are alloys because the addition of other metals improves hardness and durability. It also changes the color of the metal.
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