1. Jewelry Identifier
  2. Hallmarks
  3. RG

* gold-alloy-modifier hallmark

The RG hallmark: meaning, purity & value

Rose / pink / red gold modifier. Gold alloyed with higher copper content (and minimal silver) for warm pink to red hue. Combined with karat e.g. K18PG or K18RG.

Published May 30, 2026

Quick facts

Metal
gold-alloy-modifier
Common regions
international

Stamps that mean the same thing

This purity may be struck into jewelry as any of: RG / ROSE GOLD / Or Rose / PG / PINK GOLD / RED GOLD. The mark differs by country and era, but the metal content is identical.

What RG tells you

Rose / pink / red gold modifier. Gold alloyed with higher copper content (and minimal silver) for warm pink to red hue. Combined with karat e.g. K18PG or K18RG.

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 RG or an equivalent such as ROSE GOLD.
  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 RG the same as ROSE GOLD?
A. Yes. RG, ROSE GOLD, Or Rose, PG, PINK GOLD, RED GOLD 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 RG 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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