* Palladium hallmark
The Pd500 hallmark: meaning, purity & value
50% palladium. Uncommon; usually appears in palladium-silver alloys for medical or industrial use rather than jewelry.
Published May 30, 2026
Quick facts
- Metal
- Palladium
- Purity
- 50.0%
- Fineness
- 500/1000
- Common regions
- international
- Standard
- ISO 9202
Stamps that mean the same thing
This purity may be struck into jewelry as any of: Pd500 / PD500. The mark differs by country and era, but the metal content is identical.
What Pd500 tells you
50% palladium. Uncommon; usually appears in palladium-silver alloys for medical or industrial use rather than jewelry.
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 Pd500 or an equivalent such as PD500.
- 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. Is Pd500 the same as PD500?
- A. Yes. Pd500, PD500 all denote the same material — 50.0% palladium. Different markets and eras stamp it differently, but the purity is identical.
- Q. How do I confirm a Pd500 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.
* 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.
Download on the App Store* Related