* base hallmark
The BRONZE hallmark: meaning, purity & value
Bronze. Copper-tin alloy, reddish-brown. Historical jewelry material; some modern artisanal use. Patinas over time.
Published May 30, 2026
Quick facts
- Metal
- base
- Common regions
- international
- Density
- 8.8 g/cm³
What BRONZE tells you
Bronze. Copper-tin alloy, reddish-brown. Historical jewelry material; some modern artisanal use. Patinas over time.
How to check it yourself
- Examine the stamp under a 10× loupe — genuine marks are crisp and evenly struck, not doubled or smeared.
- Confirm the mark reads BRONZE.
- Weigh the piece and estimate its volume — the density should land near 8.8 g/cm³ for this alloy.
- Photograph it in the Jewelry Identifier app to read the metal, hallmark, and any gemstones from the image.
- For a binding result, have an assay office or gemological lab run an XRF purity test.
* Frequently asked
FAQ
- Q. How do I confirm a BRONZE 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 (8.8 g/cm³ for this alloy), scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.
* Try it
Identify the jewelry in your hand, right now.
Just take a photo — AI reads the metal, gemstone, hallmark, era, and an estimated value range in seconds. First two scans free, no account required.
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