Gold filled vs gold plated vs vermeil: what the labels mean

The short answer

None of these three is solid gold. Gold plated, gold filled and vermeil all describe a piece made of another metal with a layer of gold alloy on the outside. What separates them is how thick that layer is, how it is applied and what sits underneath. In the United States, the Federal Trade Commission’s Guides for the Jewelry, Precious Metals, and Pewter Industries set out when each term can be used without misleading buyers.

In everyday terms, gold filled usually has the most gold of the three, bonded to a base metal such as brass. Vermeil is sterling silver with a gold coating of a set minimum thickness. Gold plated covers the widest range, from a reasonably durable layer to a very thin one. The details below explain each label, the marks you will see and what they mean for wear and value.

What gold plated means

Gold plated is a broad term for a gold alloy layer on all significant surfaces of another metal. Under the FTC Guides there are two routes. A mechanically applied plating, bonded by soldering, brazing, welding or similar means, must be at least 10 karat and make up at least 1/40th of the weight of the metal in the whole piece. Terms for this include gold plate, gold overlay and rolled gold plate, often abbreviated RGP.

Electroplating is the other route: the gold is deposited with an electric current. To be called gold electroplate, or GEP, the layer must be at least 10 karat and at least 0.175 microns thick, measured as the equivalent of fine gold. That is very thin, so electroplated gold can wear through on rings and bracelets that rub against surfaces. In every case, the guides expect the karat of the plating to appear just before the term, as in 14K gold plated.

What gold filled means

Gold filled is a specific, stricter version of mechanically applied plating. The gold alloy layer must be at least 10 karat, bonded by a mechanical process, and make up at least 1/20th of the weight of the metal in the whole article, twice the minimum for rolled gold plate. Despite the name, the gold is on the outside; the inside is usually a base metal such as brass.

Because the layer is much thicker than electroplating, well-made gold-filled jewelry can last for years of normal wear without the base metal showing. You will usually see it marked with the fraction and karat together, such as 1/20 14K GF or 14/20 GF, which tells you both the gold content of the layer and its share of the total weight.

What vermeil means

Vermeil, often pronounced ver-may, is defined by its base metal. Under the FTC Guides, a piece can be called vermeil if it is sterling silver coated or plated on all significant surfaces with gold or gold alloy of at least 10 karat, at a minimum thickness equivalent to 2.5 microns of fine gold. That is the same thickness threshold the guides use for heavy gold electroplate.

One detail matters for sensitive skin and for value: if the sterling silver is first covered with a base metal such as nickel and then plated with gold, the guides say the term vermeil is deceptive unless that base-metal layer is disclosed. Since vermeil pieces often carry a 925 sterling mark, a gold-colored piece stamped 925 is a hint that it may be vermeil or gold-plated silver rather than gold.

Gold filled, gold plated and vermeil side by side

Here are the main differences at a glance, based on the FTC Guides’ definitions for the United States.

• Gold filled: at least 10K gold alloy, mechanically bonded, at least 1/20th of the total metal weight; base usually brass.
• Rolled gold plate or gold overlay: at least 10K, mechanically bonded, at least 1/40th of the total metal weight.
• Gold electroplate (GEP): at least 10K, electroplated, at least 0.175 microns of fine gold equivalent.
• Heavy gold electroplate (HGE): at least 10K, electroplated, at least 2.5 microns of fine gold equivalent.
• Vermeil: sterling silver base, at least 10K gold, at least 2.5 microns of fine gold equivalent; any base-metal layer must be disclosed.

How to read GF, RGP, GEP and HGE marks

Look for the stamp on a clasp, the inside of a ring band or a tag near the clasp of a chain. A loupe or your phone’s zoom helps, because these marks are tiny and often worn.

• GF, usually with a fraction such as 1/20 and a karat such as 12K or 14K: gold filled.
• RGP or GP, sometimes with 1/40: rolled gold plate or gold plated.
• GEP or GE: gold electroplate, a thin electroplated layer.
• HGE or HGP: heavy gold electroplate, a thicker electroplated layer.
• 925 or Sterling on a gold-colored piece: sterling silver underneath, possibly vermeil.
• 10K, 14K, 18K or 417, 585, 750 with no other letters: usually karat gold rather than a plated or filled item.

How much gold is in a gold-filled piece? A worked example

Take a gold-filled bracelet marked 1/20 14K GF that weighs 10 grams, as an illustrative example. The 1/20 tells you that at least one twentieth of the metal weight is the gold layer, so about 0.5 grams. That layer is 14K, which is 58.5 percent gold, so the bracelet contains roughly 0.29 grams of pure gold. A solid 14K bracelet of the same weight would hold about 5.85 grams.

A rolled gold plate piece marked 1/40 would hold half as much, about 0.25 grams of 14K layer in the same 10 grams. An electroplated piece holds far less: a layer a fraction of a micron thick weighs very little. This is why plated and filled jewelry is valued mostly for design and wear, not for scrap gold.

Durability, care and sensitive skin

Thickness decides how long the gold surface lasts. Thin electroplating can wear through at edges, clasps and the underside of rings, sometimes within months of daily wear. Heavy electroplate and vermeil last longer, and gold-filled pieces usually last longest. Once the base metal shows, a jeweler can often replate the piece, but it will not become gold filled.

To keep any gold layer in good shape, take pieces off before swimming, cleaning or exercise, wipe them with a soft cloth and store them so they do not rub against each other. Avoid abrasive polishing cloths and cleaners, which remove the layer you want to keep. If you react to some metals, ask what the base metal is, since brass or nickel underneath can matter once the gold wears.

Common mistakes when reading these labels

These mix-ups come up again and again when people buy or sell gold-colored jewelry.

• Reading 14K GF as 14K gold. The karat applies only to the outer layer.
• Assuming gold filled means gold inside. The gold is on the outside, over a base metal core.
• Treating vermeil as solid gold because it is expensive. It is sterling silver with a gold layer.
• Expecting plated pieces to have scrap value. The gold content is usually tiny.
• Assuming every country uses the same terms. These definitions come from the US FTC Guides; other countries have their own rules.

Where a photo check fits in

A photo app such as Jewelry Identifier — CaratAI can help you read a small or worn stamp and suggest what a mark like GF, RGP or 925 usually means. It cannot measure the thickness of a gold layer or tell you what metal is underneath, and its result is an estimate, not an appraisal.

If the difference between gold filled, plated and solid gold matters, for example before you sell or insure a piece, ask a jeweler or an assayer to test it. Use the stamp and the photo as clues for that conversation, not as the final word.

Frequently asked questions

Is gold filled better than gold plated? For durability, usually yes. Gold filled requires at least 1/20th of the metal weight in gold alloy, which is far thicker than typical electroplating, so it tends to last much longer.

Is vermeil real gold? It has a real gold layer of at least 10 karat over sterling silver, but it is not solid gold. Its value comes mostly from the silver base and the design.

Will gold filled jewelry turn my skin green? It can happen if the gold layer wears through and the brass core touches skin, but a thick, intact layer usually prevents it.

What does 1/20 12K GF mean? It means the piece is gold filled, the gold layer is 12 karat, and that layer makes up at least one twentieth of the total metal weight.