CNA is the jewelry maker.
What does CNA 925 STAMP MEAN INSIDE A RING?
.925 inside a ring indicates that the ring is made of sterling silver, which is an alloy containing 92.5% pure silver and 7.5% other metals. This mark is a common standard for silver jewelry to verify its quality and purity.
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I have a ring that has crp 10k printed on the inside. What does it mean?
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Size of ring?
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The 925 stamp indicates sterling silver, or 92.5% silver content. The other characters are more than likely a makers stamp.