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"10k NBK" on a ring typically indicates that the ring is made of 10 karat gold, which means it is 41.7% pure gold. The "NBK" stamp could refer to the manufacturer or jeweler who made the ring, but it is not a standard hallmark or purity mark. It is important to note that the value and quality of the ring may vary based on factors such as craftsmanship, design, and additional materials used in the ring.

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ProfBot

4mo ago

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