In short
Solid gold is gold alloy through and through. Gold filled is a real sheet of karat gold bonded to brass, at least one twentieth of the weight by US rule; it lasts years and holds a few dollars of gold. Vermeil and heavy gold electroplate are a film at least 2.5 microns thick, vermeil over sterling silver; they last a year or a few with care. Gold plated is a film about fourteen times thinner still, and it lasts months. The stamp tells you which you have: 14K or 585 alone, GF, 925, or GP.
Contents
The definitions, with the gold counted
| Type | What it is | Gold in a 10 g ring | Grams of gold | Melt value today |
|---|---|---|---|---|
| Solid 14k | gold alloy all the way through | 58.5% of weight | 5.85 | $829.16 |
| Gold filled, 1/20 14K GF | sheet of 14k bonded to brass; ≥ 1/20 of total weight | 5% of weight, of which 58.5% is gold | 0.29 | $41.46 |
| Vermeil | sterling silver plated with ≥ 2.5 µm of ≥ 10k gold | a film 2.5 µm thick | 0.02 | $2.76 |
| Heavy gold electroplate (HGE) | base metal plated with ≥ 2.5 µm | a film 2.5 µm thick | 0.02 | $2.76 |
| Gold electroplate (GP, GEP) | base metal plated with ≥ 0.175 µm | a film 0.175 µm thick | 0.0014 | $0.19 |
| Gold flashed / gold tone | below 0.175 µm, or paint | traces | 0 | — |
The table is the whole argument. A gold-filled ring has roughly a hundred times the gold of a plated one, which is why it survives a decade of wear where plating goes in a season. Vermeil sits between them in gold but not in price: you pay for the silver underneath, which has its own value and its own tarnish. None of the three is an investment; solid gold is the only one a buyer will weigh.
How each is made
Plating
The piece, usually brass or steel, is cleaned, given a thin nickel or palladium barrier layer, and hung in a bath of gold salts through which a current runs; gold comes out of solution and deposits on the surface a few atoms at a time. Thickness is set by minutes in the bath and is measured in microns. Standard plating is 0.2 to 0.5 µm; heavy electroplate starts at 2.5 µm. Flash plating, under 0.175 µm, is a color rinse and cannot legally be called gold plated in the US.
Vermeil
The same electroplating, but the base has to be sterling silver and the gold has to be at least 10 karat and 2.5 µm thick. Because the base is a precious metal, vermeil can be re-plated indefinitely and is the one plated category that is worth repairing.
Gold filled
A mechanical process, not a chemical one. A sheet of karat gold is bonded to a brass billet under heat and pressure, then the sandwich is rolled or drawn down to wire or sheet, so the gold layer thins in proportion and stays a fixed fraction of the weight: 1/20 by the usual standard, sometimes 1/10. Findings and chains are then made from that stock. The layer ends up tens of microns thick and welded to the core, which is why it does not flake or wear through at edges the way plating does.
Gold tone and gold color
Words with no legal content. A piece described as gold tone, gold color or gold finish may be lacquered brass, anodized aluminum or a flash of gold too thin to count. Treat it as costume.
How long each lasts, and why
Wear is abrasion, and abrasion takes microns off a surface. A ring rubs against everything you touch; earring posts and pendants rub against almost nothing. So a plated ring shows brass at the edges in weeks, a plated pendant can look fine for a year, and gold-filled anything lasts because there are roughly 30 to 100 microns of gold to get through instead of 0.2. Sweat, chlorine and cosmetics speed the process up, and they also attack the base metal once it shows, which is when the green skin marks start.
Vermeil wears like heavy plating but fails differently: when the gold goes, the silver under it tarnishes dark, and the piece can be re-plated by any jeweler for a small charge because the base is a precious metal worth keeping. A plated brass piece is rarely worth re-plating. Gold filled cannot be re-plated in the same way, but it rarely needs to be; when it finally wears through, usually at a clasp or the back of a ring, that is the end of it.
Is gold plated jewelry waterproof?
The gold is; the layer is not. Water alone does nothing, but water plus soap plus a towel is abrasion with a lubricant, and it is the towel that thins the plating. Showering in a plated ring shortens its life from a season to a month or two. Gold filled and solid gold shrug off water; vermeil tolerates it and dislikes chlorine, which tarnishes the silver through pores in the gold.
Cost per year of wear
| Ring worn daily | Example price | Realistic life | Cost per year | Gold recovered at the end |
|---|---|---|---|---|
| Gold plated | $35 | 6 months | $70 | $0 |
| Vermeil | $90 | 2 years | $45 | a few dollars of silver |
| Gold filled | $120 | 12 years | $10 | $41.46 |
| Solid 14k (10 g) | $1,900 | lifetime | $0 after year one | $829.16 at today's melt |
Read across the rows and the ranking flips. Plated is the cheapest to buy and the most expensive to own if you keep replacing it; gold filled is the cheapest per year of anything that still looks like gold; solid gold costs the most up front and is the only row that hands money back at the end. For a piece worn every day, gold filled or solid is the frugal choice. For a piece worn twice a year, plating is fine and the math does not matter.
Telling them apart
Read the stamp first.
Stamp decoderWhat 417, 585, 750, GF or GP meanOpen calculator| Stamp | Means |
|---|---|
| 14K, 18K, 585 or 750 with nothing after it and a maker's mark | solid |
| GF, 1/20 12K GF or RGP | filled |
| 925 or STERLING on a gold-colored piece | vermeil or plated silver |
| GP, GEP, HGE or no stamp at all on a gold-colored piece | plated or costume |
US law does not require a stamp, so no stamp is not proof of anything, but solid gold makers stamp because it is what they are selling.
Tests are weaker than stamps here, and this is the part most guides get wrong. An acid test kit reacts with the surface, and the surface of gold-filled and vermeil pieces is real karat gold, so both pass a surface acid test. A magnet finds steel, not brass or silver, so plated brass passes too.
What works:
- weight in the hand (brass and silver are lighter than gold for the same size, and a density check settles it);
- a look at wear points for a different-colored metal showing through;
- price. Solid 14k costs roughly what its gold weighs at retail markups of two to four times melt; a "14k" chain for the price of lunch is plated.
Sensitive skin
Reactions to gold itself are rare; reactions to nickel are common, and nickel lives in the base metals under plating and in the barrier layer plating is deposited on. So plated jewelry is the usual culprit for itching earlobes, and it gets worse as the film wears. Gold filled is generally tolerated because the layer is thick enough that skin never meets the brass; solid 14k and 18k yellow or rose gold are the safest metals short of titanium. White gold is the exception among solid golds, since many white alloys contain nickel; palladium white gold does not.
Care by type
Solid gold
Warm water, dish soap, soft brush. Ultrasonic cleaners are fine for plain pieces. Nothing else needed for decades.
Gold filled
The same cleaning; avoid abrasive polishing cloths with compound, which take off microns the layer can afford but does not need to lose. Do not have it professionally polished on a wheel.
Vermeil and plated
Wipe with a soft dry cloth after wearing. Put it on after lotion, perfume and sunscreen have dried, take it off before water, and store it in a closed pouch so the base metal does not tarnish through pores in the gold. No ultrasonic, no polishing cloth with compound, no toothpaste. When it wears, re-plate vermeil; retire plated brass.
Which to buy
- Rings and bracelets take the most abrasion, so for anything worn daily the honest choices are solid gold or gold filled; plating on a ring is a few weeks of pleasure.
- Earrings and pendants barely wear, so vermeil is a reasonable way to have a gold look over a real metal, and gold filled is the durable middle.
- Plated pieces make sense as trend items you expect to retire.
- If you react to nickel, note that base metals under plating often contain it, and once the film wears the reaction starts; solid 14k yellow or rose gold, or gold filled over brass, is the safer buy.
Questions people ask
What lasts longer, gold plated or gold filled?
Gold filled, by years rather than months. Its karat layer is 5% of the weight and tens of microns thick; plating is 0.2 to 2.5 microns. On a ring, plating shows brass at the edges within weeks to months, while gold filled commonly lasts ten to thirty years before a clasp or the back of a ring wears through. On earrings both last far longer, because nothing rubs them.
Does gold filled mean real gold?
The layer is real 12k or 14k gold bonded to brass, which is why it passes a surface acid test. As a whole the piece is 5% gold by weight: a 10 gram bracelet holds half a gram of 14k, about 0.29 g of pure gold, worth $41.46 today. Real on the outside, brass inside, and honest as long as it is sold as gold filled.
How long does gold vermeil last?
A year to a few years on pendants and earrings, less on rings and bracelets. The US minimum is 2.5 microns of gold over sterling silver; many makers plate thicker, and each micron is roughly a season of daily rubbing. When the gold goes, the silver shows and tarnishes dark, and any jeweler can re-plate it, because the base is worth keeping.
Does gold filled test as gold?
On the surface, yes, and that is the trap: the acid reacts with the top layer, and the top layer is 14k. To separate gold filled from solid without a lab, weigh it (the brass core makes the piece 30 to 40% lighter than solid gold of the same size), read the stamp (GF, 1/20), and if it matters, file a tiny notch in a hidden spot before testing; the brass shows pink.
Can you shower with 14k gold plated jewelry?
You can; the plating cannot, for long. Each shower adds soap film, hot water and a towel rub, and the towel does more damage than the water. A plated chain showered in daily is brass within a month or two; the same chain put on after drying off lasts a year. Solid 14k does not care either way.
Are gold filled and gold plated the same?
No. Both put gold over a base metal, but gold filled is a thick sheet mechanically bonded, at least 1/20 of the weight, and plated is an electrodeposited film a hundredth as thick or thinner. They are stamped differently (GF against GP or nothing), they wear differently, and a refiner buys gold-filled scrap by the pound while plated scrap goes in the bin.
Is gold plated stainless steel better than plated brass?
For a plated piece, yes. The plating wears at the same rate, but what appears underneath differs: steel stays silver-grey, does not mark skin and rarely irritates unless it contains nickel, while brass turns dull, marks skin green and often does contain nickel. The steel base is why plated steel jewelry can be showered in without turning; it still loses its color.