Karat Marks for 18K Gold. The standard karat marks for 18-karat gold are easy to recognize – they contain the number 18 followed by letters such as K, Kt, or KT, all of which indicate karat. So, if you see a stamp that reads 18K, 18KT, or 18Kt, it means the gold is 18 karats.

An “18K” stamp indicates that the piece contains 18 parts pure gold and 6 parts other metals, or is 75% gold and 25% alloy. 18k gold is considered the luxury standard in the U.S., particularly when it comes to wedding jewelry.

2023年10月2日 · Jewelry with an 18k stamp has 18 parts out of 24 parts pure gold. This is 75% pure gold, with the remaining 25% consisting of copper, nickel, or silver. If your jewelry has a 24k stamp it consists of 100% pure gold.

2017年5月3日 · The 18K mark is used in the U.S. and Japan. In Europe, 18 karat gold is marked 750, in reference to it being 75 percent pure. Under the percentage system, 10 karat gold is marked 417, 14 karat is marked 583, 22 karat is marked 916, and 24 karat is marked 100.

2025年2月27日 · The 18k stamp on gold jewelry denotes the purity of the gold. The letter K stands for karat, which is a measure of gold purity. As you might know that 24 carats equal 100% purity, 18K indicates that 18/24 was used in that particular …

18-karat gold jewelry is made of a gold alloy that contains 75% gold and 25% other metals, which make your jewelry harder than the overly soft pure gold. You can find out the purity of your gold piece by either looking at its karat stamp or testing it for its actual gold content.

2016年4月20日 · 750 stamp on jewelry means 18k Gold 417, 585, or 750 – this is just another way of telling us the gold content. However, instead of referring to how many parts out of 24 are pure gold, this number is now out of 1,000.

2021年12月15日 · 18K stamp. 18K is the most common type of marking on gold jewelry. It signifies that your item contains 75% gold, while the rest is of other metals like platinum. Unlike the 24K gold, the rich, yellow look of 18K gold makes it a more appealing material for engagement rings and other jewelry.

2021年5月20日 · Gold-plated pieces may be marked ‘GP,’ ‘GE,’ or ‘HGE.’ ‘GP’ or ‘GE’ means the piece is electroplated with a thin layer of gold; ‘18K GP’ would indicate a piece plated with 18 karat gold.

Gold must be stamped with a hallmark that tells the purchaser what karat the gold is. 18- karat gold will have a small stamp on the inside of the jewelry that reads 18k. But could a forger include that in their fake gold item?