1. Jewelry Identifier
  2. Hallmarks
  3. CERAMIC

* ceramic hallmark

The CERAMIC hallmark: meaning, purity & value

Technical/zirconia ceramic. Mohs 8.5+, extremely scratch-resistant, hypoallergenic. Cannot be resized. Common in watch bezels and contemporary rings.

Published May 30, 2026

Quick facts

Metal
ceramic
Common regions
international

Stamps that mean the same thing

This purity may be struck into jewelry as any of: CERAMIC / TECHNICAL CERAMIC. The mark differs by country and era, but the metal content is identical.

What CERAMIC tells you

Technical/zirconia ceramic. Mohs 8.5+, extremely scratch-resistant, hypoallergenic. Cannot be resized. Common in watch bezels and contemporary rings.

How to check it yourself

  1. Examine the stamp under a 10× loupe — genuine marks are crisp and evenly struck, not doubled or smeared.
  2. Confirm the mark reads CERAMIC or an equivalent such as TECHNICAL CERAMIC.
  3. Photograph it in the Jewelry Identifier app to read the metal, hallmark, and any gemstones from the image.
  4. For a binding result, have an assay office or gemological lab run an XRF purity test.

* Frequently asked

FAQ

Q. Is CERAMIC the same as TECHNICAL CERAMIC?
A. Yes. CERAMIC, TECHNICAL CERAMIC all denote the same material — ceramic. Different markets and eras stamp it differently, but the purity is identical.
Q. How do I confirm a CERAMIC stamp is genuine?
A. Look at the mark under 10× magnification for crisp, even strikes, cross-check the weight-to-volume ratio against the expected density, scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.

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