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Sorry, but karat (purity marks) do not go that low. In the US, if it is less than 10K, it cannot be marked as gold. Likely that is a manufacturer's mark- there were several makers of nice costume jewelry that did use that marking.

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8y ago
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8y ago

It means that your ring is 4 karats.

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Q: What does 4k and c inside a cirlcle on a ring band mean?
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