The marking "nb-14k" on a ring typically indicates that the piece is made of 14-karat gold, with "nb" possibly representing the manufacturer's initials or a specific design code. The "14k" signifies that the gold content is 58.3% pure gold, with the remaining alloy made up of other metals for durability and color. This marking helps identify the quality and authenticity of the gold used in the jewelry.
925 on a ring mean
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