* gold-alloy-modifier hallmark
The PG hallmark: meaning, purity & value
Pink gold modifier. Standard Japanese term for rose gold. Combined with karat e.g. K18PG. Lighter pink tone than typical Western rose gold due to lower copper proportion.
Published May 30, 2026
Quick facts
- Metal
- gold-alloy-modifier
- Common regions
- Japan, international
Stamps that mean the same thing
This purity may be struck into jewelry as any of: PG / PINK GOLD / ROSE GOLD / RG. The mark differs by country and era, but the metal content is identical.
What PG tells you
Pink gold modifier. Standard Japanese term for rose gold. Combined with karat e.g. K18PG. Lighter pink tone than typical Western rose gold due to lower copper proportion.
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 PG or an equivalent such as PINK GOLD.
- 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 PG the same as PINK GOLD?
- A. Yes. PG, PINK GOLD, ROSE GOLD, RG all denote the same material — gold-alloy-modifier. Different markets and eras stamp it differently, but the purity is identical.
- Q. How do I confirm a PG 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