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A gold ring marked "18k" indicates that it is made of 18 karat gold. Karat (k) is a measure of the purity of gold, with 24 karats being the highest purity.

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sydney, Australia

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business

A gold ring marked "18k" indicates that it is made of 18 karat gold. Karat (k) is a measure of the purity of gold, with 24 karats being the highest purity. Therefore, 18 karat gold means that the ring is made up of 18 parts gold and 6 parts of other metals (often copper, silver, or zinc) for strength and durability. This results in a gold content of 75%.
Website:https://www.gemglob.com/news/-timeless-elegance-choosing-the-perfect-gold-ring-for-every-occasion-.html