RGP (rolled gold plate)
A layer of karat gold bonded to another metal, thinner than gold filled; the mark gives its share of the weight.
Easily confused with
How to read it
The FTC’s jewelry guides reserve rolled gold plate, like gold filled, for a gold alloy layer applied by a mechanical process. Rolled gold plate and gold overlay are marked with a fraction giving the layer’s share of the metal’s weight before the karat: the guides’ own example is 1/40 12 Kt. R.G.P. The Stamping Act names rolled gold plate among the plated goods its rules cover.
Also searched as: gold overlay, R.G.P., RGP, rolled gold.
A stamp is a claim about the metal, made by whoever struck it. This page says what each mark means under the rules that define it; it doesn’t test or value anything.
Rolled gold plate or gold filled?
The same process with less gold: gold filled needs at least 1/20th of the weight, and a rolled gold plate mark such as 1/40 states a smaller share.
More jewellery marks
Sources
- Guides for the Jewelry, Precious Metals, and Pewter Industries (16 CFR Part 23), 16 CFR Part 23 (1 January 2021 edition), Federal Trade Commission, published by the U.S. Government Publishing Office, § 23.4(b)(6), § 23.4(c)(2)
- Falsely Stamped Gold or Silver or Goods Manufactured Therefrom (15 U.S.C. chapter 8), 15 U.S.C. 291–300, the National Gold and Silver Stamping Act (2021 edition), U.S. Government Publishing Office, § 297
Last reviewed September 27, 2026 by Rory Hansen. How we research