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It means karat. It is a measure of the fineness of the silver in the ring, based on 24 karats (carats) being pure silver, which is actually too soft.

22 karat silver is 22 parts silver (91.6%) and 2 parts other metals.

18 karat silver is 18 parts (75%) silver and 6 parts other metals.

Sterling silver is 22.2 parts silver (92.5%), and usually 7.5% copper.

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11y ago

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