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I have a 10K gold ring that has a "c" with a circle around it. On the other side it says GEMHK.
The "c" with a circle around it, and the GEMHK mark on your 10k gold ring is actually a trademark. The jewelry is trademarked by Frederick Goldman Inc.
GEMHK is a trademark symbol found on jewelry. It means that the piece is owned by Fredrick Goldman, Inc. of New York. It is a registered trademark.
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